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[GH-ISSUE #1583] Not able to send email to external addresses #1243

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opened 2026-02-27 11:16:05 +03:00 by kerem · 4 comments
kerem commented 2026-02-27 11:16:05 +03:00
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Originally created by @jwhitewick on GitHub (Oct 11, 2018).
Original GitHub issue: https://github.com/modoboa/modoboa/issues/1583

Impacted versions

  • Modoboa: 1.10.7
  • installer used: Yes
  • Webserver: Nginx

Steps to reproduce

Send email to my external email such as a corporate, hotmail or gmail

Current behavior

not able to send email to external account

Expected behavior

not able to send email to external account

Video/Screenshot link (optional)

1 06:13:56 whmtlmail01 postfix/qmgr[824]: F37E02226F1: from=admin@mydomain.com, size=1072, nrcpt=1 (queue active)
Oct 11 06:14:27 whmtlmail01 postfix/smtp[14127]: connect to mydomain-com.mail.protection.outlook.com[23.103.157.42]:25: Connection timed out
Oct 11 06:14:27 whmtlmail01 postfix/smtp[14127]: F37E02226F1: to=jwhitewick@whitewickgroup.com, relay=none, delay=490, delays=460/0.08/30/0, dsn=4.4.1, status=deferred (connect to mydomain-com.mail.protection.outlook.com[23.103.157.4$
Oct 11 06:15:48 whmtlmail01 dovecot: imap-login: Login: user=noreply@mydomain.com, method=PLAIN, rip=192.168.3.3, lip=172.16.1.8, mpid=14282, TLS, session=
Oct 11 06:18:15 whmtlmail01 postfix/pickup[823]: E0EEE2226FC: uid=111 from=
Oct 11 06:18:15 whmtlmail01 postfix/cleanup[14553]: E0EEE2226FC: message-id=20181011061814.E0EEE2226FC@mail.mydomain.com
Oct 11 06:18:15 whmtlmail01 opendkim[5186]: E0EEE2226FC: no signing table match for 'root@mail.app.allunac.com'
Oct 11 06:18:15 whmtlmail01 opendkim[5186]: E0EEE2226FC: no signature data
Oct 11 06:18:15 whmtlmail01 postfix/qmgr[824]: E0EEE2226FC: from=amavis@mydomain.com, size=760, nrcpt=1 (queue active)
Oct 11 06:18:15 whmtlmail01 postfix/local[14561]: E0EEE2226FC: to=<amavis@mail.mydomain.com, orig_to=, relay=local, delay=0.54, delays=0.41/0.06/0/0.07, dsn=2.0.0, status=sent (delivered to mailbox)
Oct 11 06:18:15 whmtlmail01 postfix/qmgr[824]: E0EEE2226FC: removed
Oct 11 06:18:56 whmtlmail01 postfix/qmgr[824]: 2D2642226B1: from=jwhitewick@mydomain.com, size=1367, nrcpt=1 (queue active)
Oct 11 06:19:06 whmtlmail01 dovecot: imap(noreply@mydomain.com): Disconnected for inactivity in=111 out=794
Oct 11 06:19:26 whmtlmail01 postfix/smtp[14592]: connect to mydomain-com.mail.protection.outlook.com[23.103.157.10]:25: Connection timed out
Oct 11 06:19:26 whmtlmail01 postfix/smtp[14592]: 2D2642226B1: to=other@otheremail.com, relay=none, delay=2360, delays=2329/0.05/31/0, dsn=4.4.1, status=deferred (connect to mydomain-com.mail.protection.outlook.com[23.103.157$
Oct 11 06:23:56 whmtlmail01 postfix/qmgr[824]: F37E02226F1: from=admin@mydomain.com, size=1072, nrcpt=1 (queue active)
Oct 11 06:23:56 whmtlmail01 postfix/qmgr[824]: CC2E62226E7: from=noreply@mydomain.com, size=3327, nrcpt=1 (queue active)
Oct 11 06:24:26 whmtlmail01 postfix/smtp[15241]: connect to msn-com.olc.protection.outlook.com[104.47.37.33]:25: Connection timed out

Originally created by @jwhitewick on GitHub (Oct 11, 2018). Original GitHub issue: https://github.com/modoboa/modoboa/issues/1583 # Impacted versions * Modoboa: 1.10.7 * installer used: Yes * Webserver: Nginx # Steps to reproduce Send email to my external email such as a corporate, hotmail or gmail # Current behavior not able to send email to external account # Expected behavior not able to send email to external account # Video/Screenshot link (optional) 1 06:13:56 whmtlmail01 postfix/qmgr[824]: F37E02226F1: from=<admin@mydomain.com>, size=1072, nrcpt=1 (queue active) Oct 11 06:14:27 whmtlmail01 postfix/smtp[14127]: connect to mydomain-com.mail.protection.outlook.com[23.103.157.42]:25: Connection timed out Oct 11 06:14:27 whmtlmail01 postfix/smtp[14127]: F37E02226F1: to=<jwhitewick@whitewickgroup.com>, relay=none, delay=490, delays=460/0.08/30/0, dsn=4.4.1, status=deferred (connect to mydomain-com.mail.protection.outlook.com[23.103.157.4$ Oct 11 06:15:48 whmtlmail01 dovecot: imap-login: Login: user=<noreply@mydomain.com>, method=PLAIN, rip=192.168.3.3, lip=172.16.1.8, mpid=14282, TLS, session=<Whnd5u1336bAqAMD> Oct 11 06:18:15 whmtlmail01 postfix/pickup[823]: E0EEE2226FC: uid=111 from=<amavis> Oct 11 06:18:15 whmtlmail01 postfix/cleanup[14553]: E0EEE2226FC: message-id=<20181011061814.E0EEE2226FC@mail.mydomain.com> Oct 11 06:18:15 whmtlmail01 opendkim[5186]: E0EEE2226FC: no signing table match for 'root@mail.app.allunac.com' Oct 11 06:18:15 whmtlmail01 opendkim[5186]: E0EEE2226FC: no signature data Oct 11 06:18:15 whmtlmail01 postfix/qmgr[824]: E0EEE2226FC: from=<amavis@mydomain.com>, size=760, nrcpt=1 (queue active) Oct 11 06:18:15 whmtlmail01 postfix/local[14561]: E0EEE2226FC: to=<amavis@mail.mydomain.com, orig_to=<amavis>, relay=local, delay=0.54, delays=0.41/0.06/0/0.07, dsn=2.0.0, status=sent (delivered to mailbox) Oct 11 06:18:15 whmtlmail01 postfix/qmgr[824]: E0EEE2226FC: removed Oct 11 06:18:56 whmtlmail01 postfix/qmgr[824]: 2D2642226B1: from=<jwhitewick@mydomain.com>, size=1367, nrcpt=1 (queue active) Oct 11 06:19:06 whmtlmail01 dovecot: imap(noreply@mydomain.com): Disconnected for inactivity in=111 out=794 Oct 11 06:19:26 whmtlmail01 postfix/smtp[14592]: connect to mydomain-com.mail.protection.outlook.com[23.103.157.10]:25: Connection timed out Oct 11 06:19:26 whmtlmail01 postfix/smtp[14592]: 2D2642226B1: to=<other@otheremail.com>, relay=none, delay=2360, delays=2329/0.05/31/0, dsn=4.4.1, status=deferred (connect to mydomain-com.mail.protection.outlook.com[23.103.157$ Oct 11 06:23:56 whmtlmail01 postfix/qmgr[824]: F37E02226F1: from=<admin@mydomain.com>, size=1072, nrcpt=1 (queue active) Oct 11 06:23:56 whmtlmail01 postfix/qmgr[824]: CC2E62226E7: from=<noreply@mydomain.com>, size=3327, nrcpt=1 (queue active) Oct 11 06:24:26 whmtlmail01 postfix/smtp[15241]: connect to msn-com.olc.protection.outlook.com[104.47.37.33]:25: Connection timed out
kerem closed this issue 2026-02-27 11:16:05 +03:00
kerem commented 2026-02-27 11:16:05 +03:00
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@Toniob commented on GitHub (Oct 11, 2018):

Hi,
As you can see in your logs

Oct 11 06:14:27 whmtlmail01 postfix/smtp[14127]: connect to mydomain-com.mail.protection.outlook.com[23.103.157.42]:25: Connection timed out
Oct 11 06:19:26 whmtlmail01 postfix/smtp[14592]: connect to mydomain-com.mail.protection.outlook.com[23.103.157.10]:25: Connection timed out

your server can't contact the remote one. It's either a routing problem or a firewall issue in my opinion. So nothing related to modoboa.

<!-- gh-comment-id:428846533 --> @Toniob commented on GitHub (Oct 11, 2018): Hi, As you can see in your logs ``` Oct 11 06:14:27 whmtlmail01 postfix/smtp[14127]: connect to mydomain-com.mail.protection.outlook.com[23.103.157.42]:25: Connection timed out Oct 11 06:19:26 whmtlmail01 postfix/smtp[14592]: connect to mydomain-com.mail.protection.outlook.com[23.103.157.10]:25: Connection timed out ``` your server can't contact the remote one. It's either a routing problem or a firewall issue in my opinion. So nothing related to modoboa.
kerem commented 2026-02-27 11:16:05 +03:00
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@jwhitewick commented on GitHub (Oct 11, 2018):

Which ports should I have open for modoboa to work?

<!-- gh-comment-id:428848742 --> @jwhitewick commented on GitHub (Oct 11, 2018): Which ports should I have open for modoboa to work?
kerem commented 2026-02-27 11:16:05 +03:00
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@Toniob commented on GitHub (Oct 11, 2018):

You don't have to open specific ports for modoboa. Of course you have to open postfix and dovecot ports.
The problem here is you can't connect to a remote server. It may be an issue with your firewall filtering outgoing packets, not incoming ones. Did you try to ping the remote addresses ?

<!-- gh-comment-id:428856061 --> @Toniob commented on GitHub (Oct 11, 2018): You don't have to open specific ports for modoboa. Of course you have to open postfix and dovecot ports. The problem here is you can't connect to a remote server. It may be an issue with your firewall filtering outgoing packets, not incoming ones. Did you try to ping the remote addresses ?
kerem commented 2026-02-27 11:16:05 +03:00
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@stefaweb commented on GitHub (Oct 16, 2018):

Hi @jwhitewick

Try:

ping mydomain-com.mail.protection.outlook.com
traceroute mydomain-com.mail.protection.outlook.com
telnet mydomain-com.mail.protection.outlook.com 25

A mail server generally need ports: 25, 587, 995 and 993.

<!-- gh-comment-id:430312910 --> @stefaweb commented on GitHub (Oct 16, 2018): Hi @jwhitewick Try: ``` ping mydomain-com.mail.protection.outlook.com traceroute mydomain-com.mail.protection.outlook.com telnet mydomain-com.mail.protection.outlook.com 25 ``` A mail server generally need ports: 25, 587, 995 and 993.
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