In the main window of the program web interface, open the management console tree and select the Settings section and MTA subsection.
Open the Advanced Settings section.
Click any link in the upper part of the list of settings to open the Advanced MTA settings window.
In the SMTP greeting text field, type the text that will accompany code 220 in the SMTP greeting.
In the Maximum connection attempts field, specify the maximum number of connection attempts by one remote SMTP client to the service of the SMTP server per minute.
Specify 0 if no limit is required.
Default value: 0 (no limit).
In the Maximum simultaneous connection attempts field, specify the maximum number of simultaneous connection attempts by one remote SMTP client to the SMTP server.
Specify 0 if no limit is required.
Default value: 50.
In the Maximum mail delivery requests field, specify the maximum number of message delivery requests from one remote SMTP client to the SMTP server per minute, regardless of whether this mail server accepts these messages or not.
Specify 0 if no limit is required.
Default value: 0 (no limit).
In the SMTP session timeout field, specify the maximum period of time during which a request has to be received from the remote SMTP client and a response sent by the SMTP server.
The default value is 30 seconds.
In the Interval between destination address connection attempts, specify the interval between attempts by the MTA queue manager to connect to the message destination address if the destination address is unavailable.
The default value is 60 seconds.
In the Minimum delivery interval for Deferred queue field, specify the minimum interval between attempts to deliver a message that has been deferred into the Deferred queue.
The default value is 300 seconds.
In the Maximum delivery interval for Deferred queue field, specify the maximum interval between attempts to send a message that has been deferred into the Deferred queue.
The default value is 4000 seconds.
In the Maximum queue lifetime for a message, set a limit on the time during which a message with a permanent error status will be stored in the queue. When this time elapses, the message is considered undelivered.
Default value: 3 days.
In the Deferred queue processing interval field, specify the frequency at which the Deferred queue is scanned by the queue manager.
The default value is 1000 seconds.
In the Maximum queue lifetime for a bounce message, set a limit on the time during which a bounce message with a permanent error status will be stored in the queue. When this time elapses, the message is considered undelivered.
Default value: 3 days.
In the BCC address for all messages field, specify an optional email address for receiving blind carbon copies of all messages received by the MTA.
In the Check addresses format for RFC 821 compliance list, configure (enable or disable) checking of email addresses in the SMTP MAIL FROM and RCPT TO to verify that such addresses are in angle brackets and do not contain RFC 822 comments and phrases. This scanning prevents receipt of messages from poor-quality software.
To configure the scanning of addresses, in the Check addresses format for RFC 821 compliance list, select one of the following values:
Yes, if you want to enable checking.
No if you want to disable checking.
Default value: Yes.
Configure the Disable recipient verification SMTP VRFY setting, which enables or disables the SMTP VRFY command. The SMTP VRFY command prevents specific services from collecting email addresses.
To enable or disable the SMTP VRFY command, select one of the following values in the Disable recipient verification SMTP VRFY list:
Yes, if you want to enable the command.
No, if you want to disable the command.
Default value: Yes.
In the EHLO keywords not sent by SMTP server in response field, select check boxes next to those non-case-sensitive EHLO commands (for example: pipelining, starttls, auth), which your SMTP server will not announce in the response to the EHLO request from an external SMTP client.