[GH-ISSUE #1723] Request Option to Set SMTP HELO | EHLO Host Name #1199

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opened 2026-05-07 01:00:46 +02:00 by BreizhHardware · 0 comments

BreizhHardware commented

2026-05-07 01:00:46 +02:00

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Originally created by @aque on GitHub (May 3, 2026).
Original GitHub issue: https://github.com/binwiederhier/ntfy/issues/1723

💡 Idea

I am requesting an smtp-sender-hostname option that sets the HELO or EHLO host name using func (*Client) Hello. The current setup uses localhost which generates the following error on SMTP servers that require valid names:

May 02 20:37:09 host ntfy[80147]: WARN Unable to send email to user@domain.tld: 504 5.5.2 <localhost>: Helo command rejected: need fully-qualified hostname (...)

💻 Target components

This enhancement is added to server.yml.

Originally created by @aque on GitHub (May 3, 2026). Original GitHub issue: https://github.com/binwiederhier/ntfy/issues/1723  :bulb: **Idea**  I am requesting an `smtp-sender-hostname` option that sets the `HELO` or `EHLO` host name using [`func (*Client) Hello`](https://pkg.go.dev/net/smtp#Client.Hello). The current setup uses `localhost` which generates the following error on SMTP servers that require valid names: ``` May 02 20:37:09 host ntfy[80147]: WARN Unable to send email to user@domain.tld: 504 5.5.2 <localhost>: Helo command rejected: need fully-qualified hostname (...) ``` :computer: **Target components**   This enhancement is added to `server.yml`.