[GH-ISSUE #3463] Postfix is configured by default without secure SMTP connection #1851

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opened 2026-02-27 11:19:31 +03:00 by kerem · 1 comment

kerem commented

2026-02-27 11:19:31 +03:00

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Originally created by @Luthien1582 on GitHub (Feb 17, 2025).
Original GitHub issue: https://github.com/modoboa/modoboa/issues/3463

Impacted versions: latest 2.3.4

OS Type: Debian
OS Version: 12
Database Type: PostgreSQL
Database version: 15
Modoboa: 2.3.4
installer used: Yes
Webserver: Nginx

Steps to reproduce

Install in a fresh VPS
I have used certificates generated by Let's Encrypted.
I have tried to modify the configuration of the Postfix main.cf file without success.

Current behavior

Postfix is setting by default without secure SMTP connection.

Expected behavior

Postfix should be configured by default with secure SMTP connection.

Video/Screenshot link (optional)

If I configure the mail client without secure connection.

But, if I establish the connection in STARTTLS

Thanks in advance

Originally created by @Luthien1582 on GitHub (Feb 17, 2025). Original GitHub issue: https://github.com/modoboa/modoboa/issues/3463 # Impacted versions: latest 2.3.4 * OS Type: Debian * OS Version: 12 * Database Type: PostgreSQL * Database version: 15 * Modoboa: 2.3.4 * installer used: Yes * Webserver: Nginx # Steps to reproduce Install in a fresh VPS I have used certificates generated by Let's Encrypted. I have tried to modify the configuration of the Postfix main.cf file without success. # Current behavior Postfix is setting by default without secure SMTP connection. # Expected behavior Postfix should be configured by default with secure SMTP connection. # Video/Screenshot link (optional) If I configure the mail client without secure connection. ![Image](https://github.com/user-attachments/assets/7a730e5e-4b8c-4388-a0a9-507d9dd45651) But, if I establish the connection in STARTTLS ![Image](https://github.com/user-attachments/assets/1989ce12-8638-4c28-8e04-dd79a2aef6bb) Thanks in advance

kerem closed this issue

2026-02-27 11:19:32 +03:00

kerem commented

2026-02-27 11:19:32 +03:00

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@Luthien1582 commented on GitHub (Feb 18, 2025):

Ok, I retest in a fresh VPS, and I test with telnet:

telnet mail.cuates.xyz 587
Trying 152.53.14.15...
Connected to mail.cuates.xyz.
Escape character is '^]'.
220 mail.cuates.xyz ESMTP
ehlo mail.cuates.xyz
250-mail.cuates.xyz
250-PIPELINING
250-SIZE 11534336
250-ETRN
250-STARTTLS
250-ENHANCEDSTATUSCODES
250-8BITMIME
250-DSN
250 CHUNKING
STARTTLS
220 2.0.0 Ready to start TLS
quit
Connection closed by foreign host.

I have configured this account in Evolution correctly. Thunderbird keeps giving the same error, but I assume it's Thunderbird's problem.

Thanks.

@Luthien1582 commented on GitHub (Feb 18, 2025): Ok, I retest in a fresh VPS, and I test with `telnet`: ``` telnet mail.cuates.xyz 587 Trying 152.53.14.15... Connected to mail.cuates.xyz. Escape character is '^]'. 220 mail.cuates.xyz ESMTP ehlo mail.cuates.xyz 250-mail.cuates.xyz 250-PIPELINING 250-SIZE 11534336 250-ETRN 250-STARTTLS 250-ENHANCEDSTATUSCODES 250-8BITMIME 250-DSN 250 CHUNKING STARTTLS 220 2.0.0 Ready to start TLS quit Connection closed by foreign host. ``` I have configured this account in Evolution correctly. Thunderbird keeps giving the same error, but I assume it's Thunderbird's problem. Thanks.

kerem referenced this issue

2026-02-27 12:10:24 +03:00

[PR #1851] [MERGED] Removed deprecated dependancy. #2313