1 Topic by bipsen

  • bipsen
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  • Registered: 2015-10-17
  • Posts: 13

Topic: Sending using TLS

==== Required information ====
- iRedMail version (check /etc/iredmail-release): 0.9.2
- Linux/BSD distribution name and version: CentOS 6.7
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Web server (Apache or Nginx): Apache
- Manage mail accounts with iRedAdmin-Pro? No
- Related log if you're reporting an issue:
====

There seems to be some information floating around the internet, where it is stated, that email sent over an unencrypted connection will be marked in gmail (e.g. http://phys.org/news/2015-11-gmail-mess … utes.html)

I wonder if there is a way to have postfix in iRedMail first try to deliver mail to remote servers via TLS/STARTTLS - and if that not is possible, then fall back to "normal" SMTP ....

/Brian

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2 Reply by ZhangHuangbin

  • ZhangHuangbin
  • ZhangHuangbin
  • iRedMail Developers
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  • Registered: 2009-05-06
  • Posts: 31,165

Re: Sending using TLS

You need to set 'smtp_tls_security_level = may' in /etc/postfix/main.cf to enable opportunistic TLS. Check Postfix manual page for more details:
http://www.postfix.org/postconf.5.html# … rity_level