0006201: Calendar invite: email has invalid message id - SOGo

ID	Project	Category	View Status	Date Submitted	Last Update

0006201	SOGo	Backend Calendar	public	2026-05-10 17:44	2026-05-26 19:11

Reporter	ralfbergs	Assigned To
Priority	normal	Severity	minor	Reproducibility	always
Status	new	Resolution	open
Product Version	5.12.5

Summary	0006201: Calendar invite: email has invalid message id
Description	When I send a calendar invite, the resulting email message has an invalid message id in the format Message-Id: <ae06c383-0f08-ba0a-682a-4db12d05fb49@example.org>> (note the duplicate "greater than" character!). The integration is: Thunderbird using CalDav towards my mailcow server. Thunderbird is not sending the invite locally via SMTP, but the mailcow backend creates the invite and sends it. More details here: https://github.com/mailcow/mailcow-dockerized/issues/7213
Steps To Reproduce	Send a calendar invite via SOGo's CalDAV backend. Observe that an invalid message id was generated and used as described above.
Tags	No tags attached.

Date Modified	Username	Field	Change
2026-05-10 17:44	ralfbergs	New Issue
2026-05-26 19:11	ralfbergs	Note Added: 0018487

ralfbergs 2026-05-26 19:11 reporter ~0018487	Is there anything unclear about this ticket? I'm wondering why there is no acknowledgement since more than 2 weeks...