Any future readers: My host didn't allow SMTP without ID verification. If nothing makes sense, blame your host!

==== Required information ====
- iRedMail version: 0.9.0
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySql
- Web server (Apache or Nginx): Apache
- Linux/BSD distribution name and version: Centos 6.6
- Related log if you're reporting an issue:
/var/log/maillog: http://sprunge.us/dMPC
/var/log/dovecot.log: http://sprunge.us/iTRD
iptables conf: http://sprunge.us/ZcJV
dig command showing records pointing to correct IP: http://kemosabe.in:8888/24

/etc/hosts:
127.0.0.1 localhost.localdomain localhost localhost4.localdomain4 localhost4
# Auto-generated hostname. Please do not remove this comment.
104.244.155.244 gunsight gunsight mwy.pw

====

I set up iRedMail the same as I have on my other servers, everything seems to be working except I can't receive/send mail from external sources, although I can still use the mail command from the terminal to mail to the accounts. SELinux has been disabled. I am able to connect via POP3/SMTP without problem.
The only thing I changed since install was an upgrade to php 5.5 for an extra project.