# What does DISCOURSE\_SMTP\_DOMAIN mean?

**URL:** <https://meta.discourse.org/t/what-does-discourse-smtp-domain-mean/229009>\
**Category:** Self-hosting\
**Tags:** email\
**Created:** [June 4, 2022, 1:34pm UTC](https://meta.discourse.org/t/what-does-discourse-smtp-domain-mean/229009 "2022-06-04T13:34:24Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![thoka](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/thoka/32/115652_2.png) [@thoka](https://meta.discourse.org/u/thoka)\
**Post date:** [September 2, 2023, 7:07am UTC](https://meta.discourse.org/t/what-does-discourse-smtp-domain-mean/229009/3 "2023-09-02T07:07:10Z")

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> [@meglio](#):
>
> SMTP\_ADDRESS

It is passed directly to action\_mailer

> <https://github.com/discourse/discourse/blob/38230970ea2f4426b3fdda2a74a168314f27c81a/config/environments/production.rb#L27-L47>

[Actions\_Mailer’s Docs](https://guides.rubyonrails.org/action_mailer_basics.html#action-mailer-configuration) designate it as a part of [SMTP conversation](https://www.ibm.com/docs/en/zos/2.2.0?topic=sc-helo-command-identify-domain-name-sending-host-smtp).

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