An email was sent from a user (with the email address linked to her Discourse account) to several recipients, including a Discourse group alias. The email was rejected with the Email::Receiver::TooManyRecipientsError error. Why would Discourse care of the number of recipients if these recipients a…

Hm, 17 isn’t that much, but it’s more than the default allowed. What is this setting set to on your forum? [CleanShot 2026-06-11 at 15.44.45] Does changing that to >17 changes anything? Or, if you were to try it without that discourse group alias, does it work then? If so for either, that woul…

I don’t understand what you say is triggering the error.

I haven’t tested but yes, this parameter is 10, and it says so in the rejection email. If I try without the group alias, Discourse is not involved anymore in any way so I expect no reaction. But if that means that writing to a bunch of people including a discourse group is enough to be rejected, I…

Too Many Recipients Error for emails to external recipients

Support

chapoi June 11, 2026, 12:17pm 2

I think this will have triggered the error; this is an anti-spam and anti-abuse guard.

How many members are in that group?

Topic		Replies	Views
Email-in to multiple groups Support	4	635	December 2, 2020
Incoming Email - Only first recipient is handled Bug	0	449	September 11, 2021
Mail-Receiver - public email address, do I need to worry about Spam? Support mail-receiver	4	169	August 21, 2024
One of my users just group messaged 100 other user with a spam offer Support	9	2292	July 6, 2017
Reply by email - additional addresses Support	28	2236	August 19, 2019

Too Many Recipients Error for emails to external recipients

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