[GH-ISSUE #1708] User unknown if from additional domain #1345

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opened 2026-02-27 11:16:38 +03:00 by kerem · 2 comments

kerem commented

2026-02-27 11:16:38 +03:00

Owner

Originally created by @hihachi123 on GitHub (Mar 24, 2019).
Original GitHub issue: https://github.com/modoboa/modoboa/issues/1708

Impacted versions

Modoboa: 1.13.1
installer used: Yes
Webserver: Nginx

Steps to reproduce

Installed on a new server with the latest version pulled via git.
run.py run with first domain
added second domain
created user with email-address:

username@seconddomian.tld

and created user with
username@firstdomain.tld

sent email to both email-adresses.

Current behavior

User with domain which the installed run with (=firstdomain) recieves mail.
User with second domain does not:

username@seconddomain.tld:
SMTP error from remote server for RCPT TO command, host: mail.secondomain.tld (ip) reason: 550 5.1.1 username@seconddomain.tld: Recipient address rejected: undeliverab
le address: host mail.firstdomain.tld[private/dovecot-lmtp] said:
550 5.1.1 username@seconddomain.tld User doesn't exist: username@seconddomain.tld (in reply to RCPT TO command)

Expected behavior

User within additional domain should also receive emails and be known by the system.

Video/Screenshot link (optional)

Originally created by @hihachi123 on GitHub (Mar 24, 2019). Original GitHub issue: https://github.com/modoboa/modoboa/issues/1708 # Impacted versions * Modoboa: 1.13.1 * installer used: Yes * Webserver: Nginx # Steps to reproduce Installed on a new server with the latest version pulled via git. run.py run with first domain added second domain created user with email-address: username@seconddomian.tld and created user with username@firstdomain.tld sent email to both email-adresses. # Current behavior User with domain which the installed run with (=firstdomain) recieves mail. User with second domain does not: username@seconddomain.tld: SMTP error from remote server for RCPT TO command, host: mail.secondomain.tld (ip) reason: 550 5.1.1 <username@seconddomain.tld>: Recipient address rejected: undeliverab le address: host mail.firstdomain.tld[private/dovecot-lmtp] said: 550 5.1.1 <username@seconddomain.tld> User doesn't exist: username@seconddomain.tld (in reply to RCPT TO command) # Expected behavior User within additional domain should also receive emails and be known by the system. # Video/Screenshot link (optional)

kerem closed this issue

2026-02-27 11:16:38 +03:00

kerem commented

2026-02-27 11:16:39 +03:00

Author

Owner

@tonioo commented on GitHub (Mar 25, 2019):

@hihachi123 Might a verify cache issue. Looks like you tried to send a message to this account before it was created. Postfix will then keep a cache entry for a given amount of time... You can wait for cache expiration or remove the cache file. See http://www.postfix.org/verify.8.html for more info.

@tonioo commented on GitHub (Mar 25, 2019): @hihachi123 Might a verify cache issue. Looks like you tried to send a message to this account before it was created. Postfix will then keep a cache entry for a given amount of time... You can wait for cache expiration or remove the cache file. See http://www.postfix.org/verify.8.html for more info.

kerem commented

2026-02-27 11:16:39 +03:00

Author

Owner

@hihachi123 commented on GitHub (Mar 27, 2019):

Hi there,

that did the trick!

Thanks!

Greetings

Marcel

Diese Nachricht wurde von meinem Android Mobiltelefon mit WEB.DE Mail gesendet.Am 25.03.19, 16:08, Antoine Nguyen notifications@github.com schrieb:
@hihachi123 Might a verify cache issue. Looks like you tried to send a message to this account before it was created. Postfix will then keep a cache entry for a given amount of time... You can wait for cache expiration or remove the cache file. See http://www.postfix.org/verify.8.html for more info.

—You are receiving this because you were mentioned.Reply to this email directly, view it on GitHub, or mute the thread.
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@hihachi123 commented on GitHub (Mar 27, 2019): Hi there, that did the trick! Thanks! Greetings Marcel -- Diese Nachricht wurde von meinem Android Mobiltelefon mit WEB.DE Mail gesendet.Am 25.03.19, 16:08, Antoine Nguyen <notifications@github.com> schrieb: @hihachi123 Might a verify cache issue. Looks like you tried to send a message to this account before it was created. Postfix will then keep a cache entry for a given amount of time... You can wait for cache expiration or remove the cache file. See http://www.postfix.org/verify.8.html for more info. —You are receiving this because you were mentioned.Reply to this email directly, view it on GitHub, or mute the thread. {"api_version":"1.0","publisher":{"api_key":"05dde50f1d1a384dd78767c55493e4bb","name":"GitHub"},"entity":{"external_key":"github/modoboa/modoboa","title":"modoboa/modoboa","subtitle":"GitHub repository","main_image_url":"https://github.githubassets.com/images/email/message_cards/header.png","avatar_image_url":"https://github.githubassets.com/images/email/message_cards/avatar.png","action":{"name":"Open in GitHub","url":"https://github.com/modoboa/modoboa"}},"updates":{"snippets":[{"icon":"PERSON","message":"@tonioo in #1708: @hihachi123 Might a verify cache issue. Looks like you tried to send a message to this account before it was created. Postfix will then keep a cache entry for a given amount of time... You can wait for cache expiration or remove the cache file. See http://www.postfix.org/verify.8.html for more info."}],"action":{"name":"View Issue","url":"https://github.com/modoboa/modoboa/issues/1708#issuecomment-476238985"}}} [ { "@context": "http://schema.org", "@type": "EmailMessage", "potentialAction": { "@type": "ViewAction", "target": "https://github.com/modoboa/modoboa/issues/1708#issuecomment-476238985", "url": "https://github.com/modoboa/modoboa/issues/1708#issuecomment-476238985", "name": "View Issue" }, "description": "View this Issue on GitHub", "publisher": { "@type": "Organization", "name": "GitHub", "url": "https://github.com" } } ]