To set up an account with secure connection to the mail server in an email client, follow these steps:

1. Make sure a valid SSL certificate is assigned to the mail server in Plesk at Tools & Settings > SSL/TLS Certificates and domain’s name in the certificate is the same as the name of Mail server.N.B.: use the same certificate of 123456.aqserver.it
2. Click on the certificate name to find out for which domain name it was issued.
3. When a valid SSL certificate is set up for a mail server and domain name is known, during configuration in a mail client, specify incoming and outgoing mail server name as domain name from step 2.
   • Incoming server
     
     • IMAP – use port 993 with SSL type.
     • POP3 – use port 995 and enable the option This server requires an encrypted connection (SSL), if available.
   • Outgoing server (SMTP) to use port 465 (or 587 if the submission port is enabled) with SSL or TLS type (depends on the server configuration).
   • Server name: 123456.aqserver.it
4. To enable the submission port on 587 port:        /usr/local/psa/bin/mailserver –set-message-submission true