==== Required information ====
- iRedMail version:
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):
- Linux/BSD distribution name and version:
- Related log if you're reporting an issue:
======== Required information ====
- iRedMail version: 0.8.7
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):  MySQL
- Linux/BSD distribution name and version: Ubuntu 14.04 (AWS EC2)
- Related log if you're reporting an issue: mail.log
====

Hi! I install iredmail and all function works, but when i'm access the roundcube and try to send one e-mail, i have this message:
'Error SMTP (-1): Connection failed.'.

I check on the mail.log and was registered:
Jun 11 05:27:26 ip-10-248-14-18 roundcube: Connection refused (111):
Jun 11 05:27:26 ip-10-248-14-18 roundcube: Failed to connect socket: Connection refused ():
Jun 11 05:27:26 ip-10-248-14-18 roundcube: SMTP Error: SMTP error: Connection failed: Failed to connect socket: Connection refused in /usr/share/apache2/roundcubemail-1.0.1/program/lib/Roundcube/rcube.php on line 1504 (POST /mail/?_task=mail&_unlock=loading1402464444139&_lang=pt_BR?_task=mail&_action=send)

Perhaps i've forgotten something?

thanks!