1 Topic by 2009tester (edited by 2009tester 2016-07-01 20:52:20)

  • 2009tester
  • Member
  • Offline
  • Registered: 2012-06-21
  • Posts: 15

Topic: SMTP connection between mail servers. Secured on TLS or not?

==== Required information ====
- iRedMail version (check /etc/iredmail-release):  0.9
- Linux/BSD distribution name and version: Debian
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):
- Web server (Apache or Nginx):
- Manage mail accounts with iRedAdmin-Pro?
- Related log if you're reporting an issue:


Does Iredmail force STARTLS option when delivering or receiving
email from other servers?

How to implement it?

----

Spider Email Archiver: On-Premises, lightweight email archiving software developed by iRedMail team. Supports Amazon S3 compatible storage and custom branding.

2 Reply by ZhangHuangbin

  • ZhangHuangbin
  • ZhangHuangbin
  • iRedMail Developers
  • Offline
  • Registered: 2009-05-06
  • Posts: 30,788

Re: SMTP connection between mail servers. Secured on TLS or not?

In Postfix main.cf, set below 2 parameters, reload Postfix service, then monitor Postfix log file. It will log whether the connection is secure:

smtp_tls_loglevel = 1
smtpd_tls_loglevel = 1