==== Required information ====
- iRedMail version (check /etc/iredmail-release): 0.9.5
- Linux/BSD distribution name and version: CentOS 7.2
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MariaDB 10.1.13
- Web server (Apache or Nginx): Nginx
- Manage mail accounts with iRedAdmin-Pro? no
- Related log if you're reporting an issue: report from Plugin

The SMTP debugging output is shown below:
2016-05-03 16:08:06    Connection: opening to mail.domain.tld:587, timeout=300, options=array (
                                         )
2016-05-03 16:10:13    Connection: opened
2016-05-03 16:10:14    SMTP -> get_lines(): $data is ""
====

Hello,
my Server for site is a different with iRedMail Server.
For new registrations and send mail from my Wordpress site I use WP Mail SMTP (_wordpress.org/plugins/wp-mail-smtp)
In any time (always) between Connection: opening mail.domain.tld:587 and Connection: opened lost 2 minutes and 7 seconds (around).
How to change this time to minimum?

Thank You!