How to control the retry intervals in the SMTP outgoing queue?
Posted by Gary Garber, Last modified by Valentin   on 30 June 2014 09:01 AM

Controling the retry intervals in the SMTP outgoing queue?

 

 

The outgoing queue for sent e-mails from the Icewarp Mail Server is controlled by:

  • Delivery retry intervals set in SMTP service -> Retry Intervals dialog
  • undeliverable warning after X hours

The first attempt to deliver is always just after the message enters the queue.

The default retry intervals are as follows:

  • Retry # 1 - 2 minutes later
  • Retry # 2 - 10 minutes later
  • Retry # 3 - 38 minutes later
  • Retry # 4 - 70 minutes later
  • Retry # 5 - 120 minutes later
  • Retry # 6 - 120 minutes later
  • Retry # 7 - 120 minutes later
  • Retry # 8 - 120 minutes later

After the 8th retry, the same retry interval will be used until the Undeliverable after threshold is reached (Set in Mail tab > General > Delivery tab).

If you wish to set your own retry intervals you should modify intervals in the Mail tab > General > Delivery tab --> Retry Intervals dialog.

Retry Intervals 1

The default undeliverable Warning after can also be changed in Mail Service -> SMTP Service -> Delivery tab.

Retry SMTP

 

Note that for certain "immediate" errors these retry values are ignored and Icewarp retries after 6 hours. If this retry fails a message is sent to the sender informing him of the problem but Icewarp keeps retrying for 4 days. If the message still cannot be sent, the sender is informed.

 

Updated 30.06.2014, by Valentin

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