Hello, i did install of The Perfect Server CentOS 7.4. Roundcube works fine i can send and receive emails, but i cant connect SMTP to outlook IMAP gets connected without the issue. also i have problems when i try to send email using PHP SMTP: A and MX records for mail. mydomain .com are configured and linked to my server Connection: opening to mail. domain .com:25, timeout=30, options=array ( ) Connection failed. Error #2: stream_socket_client(): unable to connect to mail. domain. com:25 (Connection timed out) [/var/www/clients/client1/web3/web/application/vendor/phpmailer/phpmailer/class.smtp.php line 298] SMTP ERROR: Failed to connect to server: Connection timed out (110) SMTP connect() failed. https:// github.com/PHPMailer/PHPMailer/wiki/Troubleshooting Also error log from ispconfig Sep 8 01:00:02 vmi202549 postfix/smtpd[30326]: connect from localhost.localdomain[127.0.0.1] Sep 8 01:00:02 vmi202549 postfix/smtpd[30326]: lost connection after CONNECT from localhost.localdomain[127.0.0.1] Sep 8 01:00:02 vmi202549 postfix/smtpd[30326]: disconnect from localhost.localdomain[127.0.0.1] Sep 8 01:00:56 vmi202549 postfix/anvil[29956]: statistics: max connection rate 1/60s for (smtp:208.64.252.230) at Sep 8 02:56:25 Sep 8 01:00:56 vmi202549 postfix/anvil[29956]: statistics: max connection count 1 for (smtp:208.64.252.230) at Sep 8 02:56:25 Sep 8 01:00:56 vmi202549 postfix/anvil[29956]: statistics: max cache size 1 at Sep 8 02:56:25 Sep 8 01:03:36 vmi202549 dovecot: imap-login: Login: user=<[email protected]>, method=PLAIN, rip=mypcip, lip=webserverip, mpid=30602, session=<39p4BFB1OQBtrJWK> Sep 8 01:03:36 vmi202549 dovecot: imap([email protected]): Disconnected: Disconnected in IDLE in=11 out=372