CONFIGURING SMTP PARAMETERS
The SMTPC module incorporates SMTP to initiate connection requests and send messages to peers on the Internet.
This screen allows you to configure the different SMTP parameters used by SMTPC.
To configure, do the following:
- Enter the SMTP Ports:
- SMTPC port
The TCP port number that SMTPC will use to deliver messages to the Internet. The default value is 25.
- SMTPD port
The TCP port number that SMTPD will use to receive messages from the Internet. The default value is 25.
- Tick the check boxes of the ESMTP support features you wish to activate:
- Enable ESMTP
If enabled, SMTPC will support ESMTP. SMTPC will issue an EHLO
command to the peer host. Other ESMTP extensions, such as SIZE, DSN, ETRN and 8-bit MIME, will also be
supported. It is recommended that this option be kept enabled.
- Enable ESMTP SIZE
If enabled, SMTPC will use the SIZE extension service. This option is enabled by default.
- Enable ESMTP 8BITMIME
If enabled, SMTPC will support 8-bit MIME. This means SMTPC can exchange messages with content body
consisting of a MIME message containing arbitrary octet-aligned material. This option is enabled by default.
- Enable ESMTP ETRN
If enabled, SMTPD will accept ETRN requests. Once an ETRN request is received, SMTPD signals the SMTPC module to
start a new queue processor for the requested ETRN host. This option is enabled by default.
- Enable ESMTP DSN
If enabled, SMTPD will accept a DSN request during MAIL FROM and/or RCPT TO commands.
This option is enabled by default.
- Configure the Delayed mail Notification parameters:
- Enable Delayed Notification
When enabled, the sender will receive a notification message from SMTPC when the ESMTP DSN is disabled, or the
DSN request does not specify NOTIFY-NEVER. This option is disabled by default.
- Enable successful Mail Notification
When enabled, Internet Exchange will send a notification message to the message sender stating that
the delayed message has been successfully sent. The default is disabled.
- Send Delayed Notification after
The amount of time in hours that SMTPC will wait before sending a mail notification for delayed messages.
The default value is 4 hours.
- Delayed mail notification text
The complete path and name of the file containing the message notifying the sender of a delayed message delivery.
If a filename is not given or the file cannot be found at the specified path, a default warning message is used.
- Successful mail notification text
The complete directory location and name of the file containing the message to be sent to the Postmaster when
the machine, after having sent at least one delayed message notification, eventually delivers the message.
If no filename is specified, or if the file cannot be found at the specified location, a default warning message is sent.
- Specify the SMTP Timeout Tunings:
- SMTPD
The timeout value (in minutes) that SMTPD waits on an open socket. This value should not be changed, but if
unusual delays are being experienced, this can be adjusted to stop SMTPD from timing out. The default value is 5
minutes.
- SMTPC Initial
The amount of time (in minutes) that SMTPC waits for the initial contact of a remote host to be completed.
The default value is 5 minutes.
- SMTPC Helo
This indicates the period (in minutes) that SMTPC will wait for the remote system to respond to the HELO command.
The default value is 5 minutes.
- SMTPC Mail
The period (in minutes) that SMTPC will wait for the remote system to respond to the MAIL FROM command in the
field . The default value is 5 minutes.
- SMTPC Rcpt
This refers to the period (in minutes) that SMTPC will wait for the remote system to respond to the RCPT TO command.
The default value is 5 minutes.
- SMTPC Data
The period (in minutes) that SMTPC will wait for the remote system to respond to the DATA command in the
field. The default value is 5 minutes.
- SMTPC Data Block
The period (in minutes) that SMTPC will wait for the remote system to respond and acknowledge the
individual buffer transmission of message data. It can also be defined as the length of time wherein SMTPC waits
between writes to the Winsock stack before it considers the remote system "dead". The default value is 5 minutes.
- SMTPC Data End
The period (in minutes) that SMTPC will wait for the remote system to respond to the DATA phase wrap up represented by
the dot (.) command. The default value is 5 minutes.
- SMTPC Quit
The period (in minutes) that SMTPC will wait for the remote system to respond to the QUIT command. The default value is 5 minutes.
- Indicate the Data Buffer Size,
which refers to the size (in bytes) of the data buffer used by SMTP programs to read data from the Internet. If the
machine uses disk caching, set this option to the size of the read ahead buffer. The default value is 4096 (4K);
the maximum buffer size is 32768 (32K).
- Tick the check box of the Set 554 SMTP error as temporary
check box. RFC821 on SMTP is not clear as to whether error 554 transaction failed
during the DATA phase should be regarded as a permanent error. Usually 5xx errors are permanent, but some SMTP
servers return 554 errors as temporary errors. Internet Exchange takes the conservative approach and retries such
message later. If this option is set to NO,
then such messages will be bounced instead or re-sent to their intended recipients. The default is YES.
- Click the Submit button to implement the settings.