==== Required information ====
- iRedMail version (check /etc/iredmail-release):      v0.9.5-1
- Linux/BSD distribution name and version: FreeBSD 10.3
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Web server (Apache or Nginx): Nginx
- Manage mail accounts with iRedAdmin-Pro? no
- Related log if you're reporting an issue: none
====

Fresh install, migrated from old server to the new one.
Roundcube works find but thunderbird can't send messages, no error in logs on the server or in thunderbird, just a time out message.
On the old server I had a smtps setup in master.cf, in the new one it is commented.
How to configure sending message for email clients like thunderbird?