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IDProjectCategoryView StatusDate SubmittedLast Update
0006201SOGoBackend Calendarpublic2026-05-10 17:442026-05-10 17:44
Reporterralfbergs Assigned To 
PrioritynormalSeverityminorReproducibilityalways
Status newResolutionopen 
Product Version5.12.5 
Summary0006201: 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
  1. Send a calendar invite via SOGo's CalDAV backend.
  2. Observe that an invalid message id was generated and used as described above.
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Issue History

Date Modified Username Field Change
2026-05-10 17:44 ralfbergs New Issue