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IDProjectCategoryView StatusLast Update
0000559AlmaLinux-10Generalpublic2025-09-14 06:54
Reporterjs1fvg Assigned To 
PrioritynormalSeverityminorReproducibilityhave not tried
Status newResolutionopen 
Summary0000559: Postfix's master.cf references 'submissions' but /etc/services lacks this entry.
Description
In the AlmaLinux postfix package(postfix-3.8.5-8.el10.x86_64_v2), master.cf contains a commented-out line for the "submissions" service:

> #submissions inet n - n - - smtpd

However, /etc/services in AlmaLinux does not include an entry for submissions (587/tcp). Only submission is present. This means enabling the submissions service in master.cf will fail to resolve the service name unless /etc/services is manually modified or the port number is used directly.

I understand the intention to change from smtps to submissions, but in practice many administrators are more familiar with smtps. Therefore, it would be preferable either to revert master.cf to use smtps (which works with the current /etc/services entry for port 465), or to include a comment in master.cf explaining the rationale for changing from smtps to submissions.

Steps To Reproduce
In /etc/postfix/master.cf, comment out the submission service line (if present) and uncomment or add the submissions service line:

> submissions inet n - n - - smtpd

Ensure /etc/services does not contain an entry for submissions (default AlmaLinux state).

Run systemctl restart postfix.

Observe that Postfix starts without error, but connecting to port 587 (e.g., telnet localhost 587) fails ? the service is not actually listening.
Tagsalma10, postfix

Activities

pastalian

2025-09-14 06:54

reporter   ~0001165

"submissions" is the new name for "smtps", and both refer to 465/tcp.

Issue History

Date Modified Username Field Change
2025-09-11 03:24 js1fvg New Issue
2025-09-11 03:24 js1fvg Tag Attached: alma10
2025-09-11 03:24 js1fvg Tag Attached: postfix
2025-09-14 06:54 pastalian Note Added: 0001165