==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release):     v0.9.9
- Deployed with iRedMail Easy or the downloadable installer? downloadable installer
- Linux/BSD distribution name and version: Ubuntu 16.04 XENIAL
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):  MYSQL
- Web server (Apache or Nginx): APACHE
- Manage mail accounts with iRedAdmin-Pro? NO
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====

Good Morning everybody.

I can't send or receive mail for external domain.

Despite the different destination domain name, when i try to send the mail in the postfix queue i have this message : delivery temporarily suspended: connect to cust16057-3.in.mailcontrol.com[85.115.54.190]:25: Connection timed out

How can i correct it ?