6.0.0-alpha10
5/14/25

[#15165] Sending to mailing list adds the mailing list name to the To-header
Summary Sending to mailing list adds the mailing list name to the To-header
Queue IMP
Queue Version FRAMEWORK_5_2
Type Bug
State Unconfirmed
Priority 2. Medium
Owners
Requester patrick.kratzer (at) hetzner (dot) com
Created 04/25/2024 (384 days ago)
Due
Updated 04/25/2024 (384 days ago)
Assigned
Resolved
Milestone
Patch No

History
04/25/2024 03:20:21 PM patrick (dot) kratzer (at) hetzner (dot) com Comment #1
State ⇒ Unconfirmed
Priority ⇒ 2. Medium
Type ⇒ Bug
Summary ⇒ Sending to mailing list adds the mailing list name to the To-header
Queue ⇒ IMP
Milestone ⇒
Patch ⇒ No
Reply to this comment
Sending a message to a mailing list adds the mailing list name in 
front of the real mail address list in the To field. The To field then 
looks like this:

To: [LIST_NAME]: [MAIL_IN_LIST1], [MAIL_IN_LIST2],...

This format is not compatible with the following RFC: 
https://www.rfc-editor.org/rfc/pdfrfc/rfc5322.txt.pdf

Sending such a mail is not a big problem in most cases but some mail 
clients have problems once "Reply to all" is used on this mail since 
the list name gets interpreted as part the first mail address in the 
list.

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