I installed 7.1.4, all working fine with SMTP/SSL/465 and POP3/SSL/995. But there is an ERP system without support for SSL. I would like to enable also SMTP/25, but I don't know how to do this. Using "nmap", it appears both ports 25 and 465, but if I try to connect from Thunderbird/Outlook in port 25, they arise an error.