Zimbra Forums

Posted: **Tue Dec 16, 2025 7:29 pm**

According to Adrian Gibanel on today's Zeta Alliance call, Zimbra are about to release a Hotfix to introduce two new Global Config attributes:

Code: Select all

zimbraMtaSmtpdPriorityFromSender

and

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zimbraMtaSmtpdPriorityToSender

This time of year, mail queues start to get larger than normal, and certain categories of customers (mostly younger users, but not always...) have been clamoring for a way to make sure that their emails (and the recipient's responses) are prioritized ahead of all other emails in the Postfix queues. Zimbra has delivered!

With this Hotfix applied, you can now create a list of email addresses that Postfix will use to prioritize deliveries from, or to, the addresses in the respective attributes.

These are multi-variate attributes, with an important default setting, as you can see here from a system with the Hotfix Release Candidate patch applied:

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zimbra@mb42:~$ zmprov desc -a zimbraMtaSmtpdPriorityFromSender
zimbraMtaSmtpdPriorityFromSender
    smtpd_sender_priority used in large Active queues to prioritize email deliveries

               type : string
              value : 
           callback : 
          immutable : false
        cardinality : multi
         requiredIn : 
         optionalIn : globalConfig,server
              flags : serverInherited
           defaults : santa@northpole.gov
                min : 
                max : 2048
                 id : 2261
    requiresRestart : yes
              since : 12.25
    deprecatedSince : 

zimbra@mb42:~$ 

zimbra@mb42:~$ zmprov desc -a zimbraMtaSmtpdPriorityToRecipient
zimbraMtaSmtpdPriorityToRecipient
    smtpd_recipient_priority used in large Active queues to prioritize email deliveries

               type : string
              value : 
           callback : 
          immutable : false
        cardinality : multi
         requiredIn : 
         optionalIn : globalConfig,server
              flags : serverInherited
           defaults : santa@northpole.gov
                min : 
                max : 2048
                 id : 2262
    requiresRestart : yes
              since : 12.25
    deprecatedSince : 

zimbra@mb42:~$

The Hotfix is scheduled for release later this week (maybe)...

Happy Holidays!
Mark

Zimbra Forums

New December 2025 Zimbra Hotfix Attributes: zimbraMtaSmtpdPriorityFromSender and zimbraMtaSmtpdPriorityToRecipient

New December 2025 Zimbra Hotfix Attributes: zimbraMtaSmtpdPriorityFromSender and zimbraMtaSmtpdPriorityToRecipient