On 7/10/2018 9:28 AM, Tracy Greggs wrote:
Did you verify the server is listening on 0.0.0.0 and that your firewall is not blocking?
CentOS 7 uses firewalld. You'll need to enable the services you use (smtp, imap, and pop3) for the default zone. Something like:
firewall-cmd --zone=public --add-service=imap --permanent firewall-cmd --zone=public --add-service=pop3 --permanent firewall-cmd --zone=public --add-service=submission --permanent firewall-cmd --zone=public --add-service=smtp --permanent https://www.digitalocean.com/community/tutorials/how-to-set-up-a-firewall-using-firewalld-on-centos-7
