1 Topic by deknoy

  • deknoy
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  • Posts: 45

Topic: Some user cannot connect POP3 and SMTP with ssl

==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release): 0.9.6
- Deployed with iRedMail Easy or the downloadable installer? no
- Linux/BSD distribution name and version: centos 7
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): PGSQL
- Web server (Apache or Nginx): Apache
- Manage mail accounts with iRedAdmin-Pro? Yes
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====

Since Old Server cannot boot up, I reinstall OS and iRedmail. I found SOME user cannot connect POP3s with ssl and SMTPs with ssl. How can I do? Please guide me. Thank you.

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2 Reply by ZhangHuangbin

  • ZhangHuangbin
  • ZhangHuangbin
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  • Registered: 2009-05-06
  • Posts: 31,091

Re: Some user cannot connect POP3 and SMTP with ssl

- Please turn on debug mode in Dovecot and check detailed log.
FYI: https://docs.iredmail.org/debug.dovecot.html

- Are these users running an old mail client application (MUA)? It's possible that old MUA doesn't support TLSv1.2.

3 Reply by deknoy (edited by deknoy 2019-06-25 09:58:12)

  • deknoy
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Re: Some user cannot connect POP3 and SMTP with ssl

ZhangHuangbin wrote:

- Please turn on debug mode in Dovecot and check detailed log.
FYI: https://docs.iredmail.org/debug.dovecot.html

- Are these users running an old mail client application (MUA)? It's possible that old MUA doesn't support TLSv1.2.

  if some user used old MUA, How can i enable TLS1.2? or how I enable older version for old MUA.  Please guide me. Thank you.

Now my MUA can connect via POP3, IMAPs, SMTP and SMTPs but failed on POP3s.

4 Reply by ZhangHuangbin

  • ZhangHuangbin
  • ZhangHuangbin
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  • Posts: 31,091

Re: Some user cannot connect POP3 and SMTP with ssl

If your MUA works with POP3/IMAPS/SMTPS, it should work with POP3S too, because your server offers same SSL/TLS support for IMAP/POP3 services.
I have no idea why it doesn't work with POP3S.