# Wrong sending IP on outgoing email
**URL:** https://forum.yunohost.org/t/wrong-sending-ip-on-outgoing-email/42292
**Category:** Advanced use case
**Tags:** mail, postfix, english
**Created:** [May 18, 2026, 8:08pm UTC](https://forum.yunohost.org/t/wrong-sending-ip-on-outgoing-email/42292 "2026-05-18T20:08:19Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@edna](https://forum.yunohost.org/u/edna)
#### Post date: [May 18, 2026, 8:08pm UTC](https://forum.yunohost.org/t/wrong-sending-ip-on-outgoing-email/42292/1 "2026-05-18T20:08:19Z")
**What type of hardware are you using** : Virtual machine
**What YunoHost version are you running** : 12.1.39
**How are you able to access your server** : The webadmin
SSH
### Describe your issue
I have two network interfaces on my container, one to the local network and one with a public IP.
When sending emails postfix uses the local IP as sender IP and thus get blocked.
How can i specify the sending IP in Yunohost/Postfix?
Strangely I’m quite sure this worked previously. I have however since tried to change the default domain if that might affect this.
### Share relevant logs or error messages
Headers in bounced email:
Received: from “mydomain\_com” (“hostname” [192.168.1.157])
Which result in the bounce:
said: 554 5.7.1
Spam message rejected (in reply to end of DATA command)
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### Author:  [@edna](https://forum.yunohost.org/u/edna)
#### Post date: [May 19, 2026, 6:54pm UTC](https://forum.yunohost.org/t/wrong-sending-ip-on-outgoing-email/42292/2 "2026-05-19T18:54:21Z")
Ok, it could be the reverse lookup that pointed wrong since i changed the default domain. Seems to work now 😕
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### Author:  [@system](https://forum.yunohost.org/u/system)
#### Post date: [June 18, 2026, 6:54pm UTC](https://forum.yunohost.org/t/wrong-sending-ip-on-outgoing-email/42292/3 "2026-06-18T18:54:32Z")
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