Configuring mail settings : Configuring the built-in MTA and mail server : Configuring mail server settings : Configuring outgoing email options
 
Configuring outgoing email options
For outgoing email, you can specify to use an STMP relay, instead of the FortiMail built-in MTA, to deliver email.
Under some circumstance, connections from certain relays may by blocked by other parties. If you have other backup relays, you can use them instead.
For information about adding STMP relays, see “Configuring SMTP relay hosts”.
GUI item
Description
Deliver to relay host
Select a relay that you configured in “Configuring SMTP relay hosts”.
Disable ESMTP
Mark the check box to disable (ESMTP) for outgoing email.
By default, FortiMail units can use ESMTP commands. ESMTP supports email messages with graphics, sound, video, and text in various languages. For more information on ESMTP, see RFC 1869.
Delivery Failure Handling
When email delivery fails, you can choose to use the mail queue settings (“Configuring mail queue setting”) to handle the temporary or permanent failures. You can also try another relay that you know might work.
 
Normal
Select this option if you want to queue the email and use the mail queue settings.
 
Deliver to relay host
Select another relay (backup relay) that you want to use for failed deliveries. Then specify how long the undelivered email should wait in the normal queue before trying the backup relay.
You can also specify which types of failed connections the backup relay should take over and retry:
• DNS failure: failed DNS lookups
• Network failure -- connection
• Netowrk failure -- other
• Temporary failure from remote MTA (4XX reply code)
• Permanent failure from remote MTA (5XX reply code)