Web And Email Hosting, Jsp, Tomcat, J2Ee, Hibernate Programming Blog

# hosts file (normally /etc/hosts) #O HostsFile=/etc/hosts The HostsFile option specifies the path to the file containing locally customized IP address-to-hostname translations. The default value is /etc/hosts. The next lines relate to dial-up delays when the connection fails: # dialup line delay on connection failure #O DialDelay=10s When a dial-up connection to the Internet needs to be established, the time required to secure the connection can vary greatly. The DialDelay option allows a number of seconds or minutes to be specified, which represents the amount of time sendmail will sleep if its initial connection attempt fails. The next lines let you define what happens when there is no recipient in the message: # action to take if there are no recipients in the message #O NoRecipientAction=add-to-undisclosed The NoRecipientAction option instructs sendmail what to do if a message has no recipients specified in the header lines. The valid parameters include add-apparently-to (adds an Apparently-To: header line), add-bcc (adds an empty Bcc: header line to comply with RFC 821), add-to (adds a To: header with recipients from the message envelope ), add-to-undisclosed (adds an empty To: undisclosed-recipients: header line), and none (delivers the message without modification). The next lines can be used to change the root directory used by sendmail: # chrooted environment for writing to files #O SafeFileEnvironment=/arch The SafeFileEnvironment option provides a more secure location for delivering mail to files by using a chroot system call. The next lines define whether colons are okay in an address: # are colons OK in addresses? #O ColonOkInAddr=True The ColonOkInAddr option determines whether colons are valid within addresses. The default value is False, indicating that a colon within an e-mail address represents an error. The next lines define how many jobs you can process in the queue: # how many jobs can you process in the queue? #O MaxQueueRunSize=10000 The MaxQueueRunSize option indicates the maximum number of queued messages that can be processed during one run of the queue. The preceding line sets the limit at 10,000 messages. The next lines relate to expanding CNAMES: # shall I avoid expanding CNAMEs (violates protocols)? #O DontExpandCnames=False The DontExpandCnames option controls whether sendmail accepts a CNAME record as the canonical hostname. If the DontExpandCnames option is set to True, the CNAME record is considered valid within the rewriting rules. If it is set to False (the default value), the CNAME record must be translated into a valid address record for use within the rewriting rules. The next lines relate to the SMTP login message: # SMTP initial login message (old $e macro) O SmtpGreetingMessage=$j Sendmail $v/$Z; $b The SmtpGreetingMessage option defines the banner text presented when a client connects to the sendmail daemon on the local machine. In the preceding line, $j evaluates to the FQDN of the local machine; $v and $Z represent the configuration file and executable program versions, respectively; and $b is the current local date
If you are looking for affordable and reliable webhost to host and run your business application visit our ftp web hosting services.

#O MaxDaemonChildren=12 # maximum number of new connections per second #O ConnectionRateThrottle=0 Sendmail forks a copy of itself to handle each incoming message and to process the queue. The MaxDaemonChildren option restricts the number of children of the original sendmail process that can exist simultaneously. Though this sounds like a good idea, it also makes it easier for someone to implement a Denial-of-Service attack on your machine by keeping all available child processes occupied. A better solution (if you must limit incoming connections) is to use the ConnectionRateThrottle option. Rather than deny all connections beyond a certain threshold, the ConnectionRateThrottle option slows down the acceptance of messages. Using a value of three as an example, if eight connections arrive simultaneously, three are handled immediately; three more are processed after a one-second delay; and the remaining two are handled after a two-second delay. The next lines relate to processes for queued jobs: # deliver each queued job in a separate process? #O ForkEachJob=False The ForkEachJob option instructs sendmail to fork a copy of itself to handle each individual message in the queue. This may be useful for machines with limited amounts of memory but should generally not be used (or set to False). The next lines are related to message priority: # work recipient factor #O RecipientFactor=30000 # work class factor #O ClassFactor=1800 # work time factor #O RetryFactor=90000 # shall we sort the queue by hostname first? #O QueueSortOrder=priority # minimum time in queue before retry #O MinQueueAge=30m The ClassFactor and RecipientFactor options can be used to alter the priority of a message in the queue based on its precedence class or number of recipients. The RetryFactor option can be used to alter the priority of a message in the queue that has already been processed but couldn t be delivered. The QueueSortOrder option, which can select the method used to determine the queue priority, can be set to host (the messages in the queue are sorted based on the receiving host and the priority), priority (the traditional precedence scale), and time (based on the order of submission). MinQueueAge sets the minimum amount of time a failed message transfer waits in the buffer before transmission is retried. The next lines relate to the character set: # default character set #O DefaultCharSet=iso-8859-1 The DefaultCharSet option defines the MIME type used when converting 8-bit messages into 7-bit messages. The next lines define the location of the service.switch file: # service switch file (ignored on Solaris, Ultrix, OSF/1, others) #O ServiceSwitchFile=/etc/mail/service.switch Because the /etc/nsswitch.conf file already dictates the order for resolving various database requests, the ServiceSwitchFile option is ignored, even if defined. It is best to leave it commented out. The next lines let you redefine the location of the /etc/hosts file:
Please visit Domain Name Hosting services for high quality webhost to host and run your jsp applications.

Statistics from Mon Jul 19 13:05:24 1999 M msgsfr bytes_from msgsto bytes_to msgsrej msgsdis Mailer 4 414 3845K 23 894K 0 0 smtp 8 10 19K 8 13K 0 0 local ============================================================= T 424 3864K 31 907K 0 0 The next lines relate to how time zones are handled: # time zone handling: # if undefined, use system default # if defined but null, use TZ envariable passed in # if defined and non-null, use that info #O TimeZoneSpec= The TimeZoneSpec option allows the explicit selection of the local time zone, overriding the value in the TZ environment if it exists. The next lines relate to the UID and GID used by sendmail: # default UID (can be username or userid:groupid) O DefaultUser=8:12 The DefaultUser option specifies the UID and GID of the default user to which sendmail switches when delivering mail. In this case, it is set to mail:mail (UID 8 and GID 12). The next lines relate to the location of the user database file: # list of locations of user database file (null means no lookup) O UserDatabaseSpec=/etc/mail/userdb.db The UserDatabaseSpec option enables the specification of another database that can redirect incoming messages and rewrite the header fields of outgoing messages. The next lines can be used to create fallback connections: # fallback MX host #O FallbackMXhost=fall.back.host.net # if we are the best MX host for a site, try it directly instead of config err O TryNullMXList=true The FallbackMXhost option can be used by sites that don t have a reliable connection to the Internet, where it would be preferable to relay the messages to another host with a better connection rather than queue the mail on the local machine. If the host sending a message is also an MX (mail exchanger) host for the receiving host, all hosts with a higher MX preference are deemed invalid. If this results in no available mail exchangers, the message will be returned to the sender if the TryNullMXList option is set to False. If the option is set to True, sendmail tries to send mail directly to the receiving host before returning the message as undelivered. The next lines relate to responses to high load averages: # load average at which we just queue messages #O QueueLA=8 # load average at which we refuse connections #O RefuseLA=12 The QueueLA option specifies the system load average at which point mail is not delivered immediately but queued for later processing. The RefuseLA option sets the point at which incoming mail is no longer accepted. The next lines relate to the number of child processes and new connections: # maximum number of children we allow at one time
We recommend high quality webhost to host and run your jsp application: christian web host services.

in the form Timeout.event, where event is replaced by the timeout events listed in the table. Table 19-4: Timeout Events Timeout Events Waiting for . . . Command the next command Connect the acceptance of a connection Datablock the read of the DATA block to complete datafinal acknowledgment of the final dot or End-Of-File marker datainit acknowledgment of the DATA command fileopen an NFS file open command to complete helo a HELO or EHLO hoststatus the results of a host status check iconnect the initial connect(2) system call to complete ident the results of an identification protocol response initial the initial greeting message mail acknowledgment of the MAIL command misc acknowledgment of other SMTP commands queuereturn (any priority) the message delivery to complete (a bounce message will be delivered) queuewarn (any priority) the message delivery to complete (a warning message will be delivered) quit acknowledgment of the QUIT command rcpt acknowledgment of the RCPT command rset acknowledgment of the RSET command The next lines relate to pruning routes: # should we not prune routes in route-addr syntax addresses? #O DontPruneRoutes With the DontPruneRoutes option, an address can be specified as a route address where an explicit path through a sequence of hosts is indicated. If the option is set to True, this route is followed. Otherwise, the route is pruned. The next lines relate to where messages are stored as they are being delivered: # queue up everything before forking? O SuperSafe=True If the SuperSafe option is set to False, sendmail reads a message into memory before delivering it. If the machine were to crash at this point, the message would be lost. When the SuperSafe option is set to True, the message always exists on the file system until delivery is completed. No good reason exists for this option to be set to False. The next lines relate to the status file: # status file O StatusFile=/var/log/sendmail.st The StatusFile option specifies a file where mail delivery statistics can be stored. This file is then parsed by the mailstats program to display the number of messages sent and the size of those messages (in kilobytes), the number of messages received and the size of those messages (also in kilobytes), the number of messages rejected, and the number of messages discarded. The first column and the last column indicate the MDA. The last row displays totals for each column. The following is a sample:
In case you need quality webspace to host and run your web applications, try our personal web hosting services.

The PrivacyOptions option can be used to require that incoming connections strictly adhere to correct SMTP behavior, disable the EXPN (noxepn) or VRFY (novrfy) functions, disable return receipts, and restrict the users who may run the mailq and sendmail -q commands (restrictqrun). The mailq command shows all entries in the queue, while the sendmail -q command synchronously processes the queue. The PrivacyOptions option also enables utilization of the “X-Authentication-Warning:” header line. The next lines relate to copies of error messages: # who (if anyone) should get extra copies of error messages #O PostMasterCopy=Postmaster The PostMasterCopy option can specify an address (or several) that should receive copies of any delivery status notifications that are sent to message senders. The default is to send no copies. The next lines relate to the mail queue: # slope of queue-only function #O QueueFactor=600000 # queue directory O QueueDirectory=/var/spool/mqueue The QueueFactor option takes the current system load average into consideration and can implement a cutoff value where outbound messages are queued rather than immediately sent. The QueueDirectory option specifies the location of queued outbound messages. The filename prefixes present in this directory are described in Table 19-1 earlier in this chapter. The next lines relate to timeout values used by sendmail: # timeouts (many of these) #O Timeout.initial=5m O Timeout.connect=1m #O Timeout.iconnect=5m #O Timeout.helo=5m #O Timeout.mail=10m #O Timeout.rcpt=1h #O Timeout.datainit=5m #O Timeout.datablock=1h #O Timeout.datafinal=1h #O Timeout.rset=5m #O Timeout.quit=2m #O Timeout.misc=2m #O Timeout.command=1h #O Timeout.ident=5s #O Timeout.fileopen=60s O Timeout.queuereturn=5d #O Timeout.queuereturn.normal=5d #O Timeout.queuereturn.urgent=2d #O Timeout.queuereturn.non-urgent=7d O Timeout.queuewarn=4h #O Timeout.queuewarn.normal=4h #O Timeout.queuewarn.urgent=1h #O Timeout.queuewarn.non-urgent=12h #O Timeout.hoststatus=30m #O Timeout.resolver.retrans=5s #O Timeout.resolver.retrans.first=5s #O Timeout.resolver.retrans.normal=5s #O Timeout.resolver.retry=4 #O Timeout.resolver.retry.first=4 #O Timeout.resolver.retry.normal=4 Several options relating to timeouts while waiting for events can be specified, as shown in the preceding lines. These values limit the amount of time sendmail spends waiting for an event to occur or complete. The actual time values can be specified in seconds, minutes, hours, or days (with each specified as an integer followed by an s, an m, an h, or a d, respectively). An explanation for each is given in Table 19-4. Each timeout option is
In case you need quality webspace to host and run your web applications, try our personal web hosting services.

The UseErrorsTo option allows sendmail to utilize or ignore the Errors-To: header line. If set to True, any delivery errors are reported to the address specified in the header line. Otherwise, this line is ignored. The option is set to False by default because this behavior violates RFC 1123. The next lines relate to the log level: # log level O LogLevel=9 The LogLevel option sets the priority and severity of logging messages sent to the syslog facility. Values range from 0 (only severe errors are reported) to 98 (maximum debugging information is logged, along with all the more important messages). Unless you need to view copious amounts of debugging information while tracking down a mail delivery problem, the default value of 9 provides a suitable level of detail. The next lines relate to how messages are sent to the message sender: # send to me too, even in an alias expansion? #O MeToo=True The MeToo option selects sendmail s behavior when the sender of a message is also on the mailing list s distribution list. Unless a value of True is specified, the sender does not receive the message (based on the assumption that if the sender wrote the message, the sender doesn t need to see it again). The next lines have to do with evaluating addresses: # verify RHS in newaliases? O CheckAliases=False If the value is set to True, the CheckAliases option evaluates addresses on the left side of the colon and guarantees a valid delivery agent for addresses on the right side. The default value is False. The next lines relate to old-style headers: # default messages to old style headers if no special punctuation? O OldStyleHeaders=True Lists of recipients were originally delimited by spaces. More recently, commas have been used because recipient names frequently contain spaces. When set to True, the OldStyleHeaders option allows comma-delimited lists, but unquoted spaces are converted to commas. If the option is set to False (the default), uncommented spaces are converted to the character specified by the BlankSub option. The next lines relate to SMTP daemon options: # SMTP daemon options # DaemonPortOptions=Name=MTA O DaemonPortOptions=Port=smtp, Addr=127.0.0.1, Name=MTA # SMTP client options #0 ClientPortOptions=Address=0.0.0.0 The DaemonPortOptions option can be used to restrict the port number and network on which sendmail will listen for incoming connections, the number of simultaneous incoming connections, and the size of the TCP/IP send and receive buffers. Note By default, the DaemonPortOption=Port=smtp line shown above restricts access to the smtp port (Port 25) and only to the local host (Addr=127.0.0.1) for mail transfer (Name=MTA). You must change or comment out the line to allow your mail server to accept mail from host computers other than the local host. The ClientPortOptions option is the same as DaemonPortOptions, except that it works for outgoing connections rather than incoming connections. The next lines relate to privacy: # privacy flags O PrivacyOptions=authwarnings,novrfy,noexpn,restrictqrun
Please visit our professional web hosting services to find out about cheap and reliable webhost service that will surely answer all your demands.

significance. The next lines relate to resolver options: # name resolver options #O ResolverOptions=+AAONLY The ResolverOptions option can be used to tune the behavior of DNS lookups. Descriptions of the available flags can be found in the man page for resolver (type man resolver). The next lines relate to MIME errors: # deliver MIME-encapsulated error messages? O SendMimeErrors=True The SendMimeErrors option defines whether delivery status notification messages should be MIME-encoded or left as plain text. The next lines relate to search paths used for forwarding e-mail messages: # Forward file search path O ForwardPath=$z/.forward.$w:$z/.forward The ForwardPath option specifies the search path for an individual user s .forward file. In the preceding line, $z represents the user s home directory, and $w indicates the local machine s hostname. For example, if /home/kzabon were the home directory for the user kzabon on the local machine al, sendmail would first look for the file /home/kzabon/.forward.al, followed by /home/kzabon/.forward. If neither file existed, the mail would be delivered to the incoming mailbox file /var/spool/mail/kzabon. The next lines relate to how caching is used on open connections: # open connection cache size O ConnectionCacheSize=2 # open connection cache timeout O ConnectionCacheTimeout=5m Rather than open a connection to a host, send a message, close the connection, and then open another connection to the same host, connection caching allows sendmail to send multiple mail messages to the same machine over one connection. This ConnectionCacheSize option can reduce the overhead of creating and destroying connections. The default value of 2 indicates that a maximum of two simultaneous connections can be maintained. The ConnectionCacheTimeout value specifies the maximum amount of time that a connection can be maintained. The default value is 300s, which is equivalent to 5m (five minutes). The next lines relate to the host status directory and thread deliveries: # persistent host status directory #O HostStatusDirectory=.hoststat # single thread deliveries (requires HostStatusDirectory)? #O SingleThreadDelivery=False The HostStatusDirectory option can establish a directory (relative to the queue directory /var/spool/mqueue if a full pathname isn t specified) that stores status information for all machines with which sendmail has established a connection. This option is not set by default, because its implementation consumes resources but may not provide a substantial gain. The SingleThreadDelivery option ensures that there is always a maximum of one connection to any given machine. This, too, may not be desirable. Not only does it require the HostStatusDirectory option, it may also prevent any outgoing messages to a host if the local machine is currently processing a high volume of mail from that same machine. The next lines relate to the Errors-To header: # use Errors-To: header? O UseErrorsTo=False
Note: If you are looking for cheap and reliable webhost to host and run your mysql application check mysql web server services.

m Mail an error message, and exit with an error code. p Print the error message to the user s terminal and save the message in ~/dead.letter. This is the default. q Quietly ignore all delivery errors. w Write the error message to the user s terminal. The next lines relate to the From lines in e-mail messages: # save Unix-style “From_” lines at top of header? #O SaveFromLine=False By default, the SaveFromLine option is disabled (False). The result is that lines within mail messages that begin with the text From (a special token that differentiates the end of one message from the headers of the next) will be prefaced by a > in the delivered message. The next lines relate to permissions of temporary files: # temporary file mode O TempFileMode=0600 The TempFileMode option sets the file permissions of temporary files to be readable only by the owner of the file. All other modes are highly discouraged. The next lines relate to the GECOS field: # match recipients against GECOS field? #O MatchGECOS=False The MatchGECOS option lets sendmail deliver mail to a converted form of a user s full name, as specified in the GECOS field of the /etc/passwd file. For example, if the full name of user wharris (according to the GECOS field) is Wayne Harris, that user could receive mail as wharris@mybox.com, Wayne_Harris@mybox.com, or Wayne.Harris@mybox.com. This option is not recommended, because it could lead to ambiguities, and users could change their GECOS fields in a way that could subvert sendmail s usual delivery mechanisms. The next lines relate to hop counts: # maximum hop count #O MaxHopCount=17 The MaxHopCount option specifies the largest number of hops (a transmission of the message from one machine to another) before a message is returned to the sender as undeliverable. The default value is 17. The next lines relate to the sendmail help file: # location of help file O HelpFile=/etc/mail/helpfile The HelpFile option lists the name of the file containing the online help text. To view this data, execute the command telnet localhost 25 and type help. Help is also available for most SMTP commands using the help command via help command name. The next lines relate to dots as terminators: # ignore dots as terminators in incoming messages? #O IgnoreDots=False The IgnoreDots option determines the behavior of sendmail when presented with a message that contains a single . on a line. With the option nonexistent, commented, or set to False, the single dot is treated as the end of the message (the behavior specified in RFC 821). If the option is set to True, the dot assumes no special
Searching for affordable and reliable webhost to host and run your web applications? Go to our java web server services and you will be pleased.

If an MDA definition (explained later in this section) includes the option F=e, the mailer is classified as expensive, which simply indicates that delivering that mail may involve a slow connection or other processing delay. The HoldExpensive option allows messages handled by an expensive MDA to be queued rather than processed immediately. The preceding line disables this option. The next lines relate to checkpoint queues: # checkpoint queue runs after every N successful deliveries #O CheckpointInterval=10 When delivering messages to many addresses (as in a mailing list scenario), sendmail occasionally needs to record which recipients have already received the message and which have not. The CheckpointInterval option specifies the number of recipient addresses processed between updates of the qf file. The preceding line is commented out, but the default value is 10 anyway. The next lines relate to delivery mode: # default delivery mode O DeliveryMode=background The four possible DeliveryMode values are as follows: background Sendmail forks (splits off) a copy of itself and asynchronously processes the message. The default mode is background. deferred The message is queued and all processing, including DNS lookups and database accesses, is deferred until the queue is run. interactive The queue is processed synchronously, in the foreground. queueonly Much like deferred, but hostnames are resolved and databases are queried immediately. The next lines relate to rebuilding the alias database: # automatically rebuild the alias database? # NOTE: There is a potential for a denial of service attack if this is set. # This option is deprecated and will be removed from a future version. O AutoRebuildAliases= If no argument is specified, AutoRebuildAliases is set to true. In this case, if sendmail discovers that the modification time of the /etc/aliases file is newer than that of the /etc/aliases.db file, the Berkeley database file is rebuilt. The next lines relate to error message headers and error modes: # error message header/file #O ErrorHeader=/etc/mail/error-header # error mode #O ErrorMode=print The ErrorHeader option allows the text of a specified file to be included in all delivery status messages returned to the sender, along with any error messages from the xf file. The ErrorMode option provides five possible methods of displaying error messages to users on the local machine who encounter problems while attempting to send mail: e Mail an error message to the sender, but terminate successfully.
If you are in need for cheap and reliable webhost to host your website, we recommend http web server services.

any mail sent to jefft on the local machine would result in an informational message being returned to the original sender, indicating the changed address. The original mail message will not be forwarded to the address listed in the jefft example above. The DZ8.11.4 line sets the macro Z, which contains the full version information for the sendmail daemon. sendmail options The sendmail.cf file contains a long list of options that you can set for sendmail on your Red Hat Linux system. Option definitions start after the Options block. Here is an example of the beginning of the Options section: ############### # Options # ############### # strip message body to 7 bits on input? O SevenBitInput=False # 8-bit data handling # O EightBitMode=pass8 The SevenBitInput option indicates that sendmail should not clear the most significant bit from each byte of all mail messages. The EightBitMode option dictates how sendmail should handle message data that is not explicitly labeled as 8-bit. The pass8 option allows any 8-bit data to be delivered unaltered; mimefy converts any unspecified data to a MIME-encoded type; strict rejects any unlabeled 8-bit data. Note that this option has no effect on data that is specified as 8-bit. The next lines relate to alias files: # wait for alias file rebuild (default units: minutes) O AliasWait=10 # location of alias file O AliasFile=/etc/aliases Before rebuilding the aliases database, sendmail performs several checks to make sure that no other processes are attempting to do the same. The AliasWait option specifies the number of minutes that sendmail alternates between waiting and performing its checks. The AliasFile option specifies the location of the plain-text file containing mail aliases. The next lines relate to how disk space is allocated for sendmail: # minimum number of free blocks on filesystem O MinFreeBlocks=100 # maximum message size #O MaxMessageSize=1000000 The MinFreeBlocks option specifies that a message will be rejected if the acceptance of that message would cause there to be less than 100 free blocks (100K) available on the file system where messages are stored. The MaxMessageSize, if uncommented, can impose a limit on the maximum size of an incoming e-mail message (1MB in the preceding line). By default, there is no restriction on the size of a message. The next lines are for substituting characters for blank space: # substitution for space (blank) characters O BlankSub=. The BlankSub option substitutes the specified character (a . here) in place of a blank space (which is an illegal character) in an e-mail address. The next lines are for avoiding expensive mailers: # avoid connecting to “expensive” mailers on initial submission? O HoldExpensive=False
We recommend cheap and reliable webhost to host and run your web applications: Coldfusion Web Hosting services.