# Unexplained Email::Receiver::InvalidPost errors

**URL:** https://meta.discourse.org/t/unexplained-email-invalidpost-errors/377793
**Category:** Bug
**Created:** [August 7, 2025, 8:31pm UTC](https://meta.discourse.org/t/unexplained-email-invalidpost-errors/377793 "2025-08-07T20:31:32Z")
**Posts on this page:** 1
**Showing post:** 35

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### Author: ![lavamind](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/lavamind/32/237909_2.png) [@lavamind](https://meta.discourse.org/u/lavamind)
#### Post date: [February 4, 2026, 6:14pm UTC](https://meta.discourse.org/t/unexplained-email-invalidpost-errors/377793/35 "2026-02-04T18:14:53Z")

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> [@supermathie](#):
>
> Note that to bypass these checks, the mail has to be sent to the _category_ email address and not the site’s `reply_by_email_address`.

Oh that’s interesting, and seems to be contrary to the guidance [posted here](https://meta.discourse.org/t/mirroring-a-read-only-mailing-list-in-discourse/77990#p-370863-subscribing-to-the-mailing-list-4) to setup a mailing list mirror:

> Subscribe to the mailing list using your Discourse email address (e.g., `discourse@example.com`).

I checked the email address subscribed to our mailing lists on behalf of Discourse and it’s indeed `discourse@forum.torproject.org`.

Should I be using a different email address here? If so, which one?

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_[View the full topic](https://meta.discourse.org/t/unexplained-email-invalidpost-errors/377793)._