Some users report, that they don’t get some emails from our discourse instance. We are using “mailing list mode”. I tried to analyze one specific occurrence: approximately four out of 117 users of a group reported that they did not get a given mail. The other people did get the email. The affected u…

self hosted. Shouldn’t I see the email as mentioned in the mail protocol under sent, if it was forwarded to our email provider (it’s Strato)?

Yes that is true. I used a coding agent to summarise when emails are suppressed in mailing list mode: - The user muted the topic, category, or one of its tags. - The user muted or ignored the author. - The user cannot access the post - for example, it is in a restricted category. - The account is …

[image] merefield: I used a coding agent to summarise when emails are suppressed in mailing list mode: Thanks, as an admin I mocked the user and I’ll go to each of it to debug the case: General: mailing list mode is activated in the user settings (via global setting) [image] merefield: …

Anyone else having an idea? Random lost emails erode users trust in the system, and I’d like to improve stability here. @Falco sorry for pinging you directly. As you were involved in the discussion of above topic covering an issue with the same effect, maybe do you have another pointer to dig deepe…

How to debug email sending issues? (some recipients don't get some emails)

Product Support

merefield (Robert) September 29, 2026, 9:25pm 2

Are you hosted? Talk to your host.

If self-hosted, who is your email sending provider? Have you looked at your logs there?

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How to debug email sending issues? (some recipients don't get some emails)

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