I have installed the Synology Mailserver (not MailPlus) and would like to receive mails using IMAP.
I've created the following DNS records
sinnema.me NS ns1.isource.nl sinnema.me NS ns2.isource.nl sinnema.me A 220.127.116.11 sinnema.me MX(0) 18.104.22.168 ftp.sinnema.me CNAME sinnema.me www.sinnema.me CNAME sinnema.me
I've forwarded and opened the following ports on my ISP's router (KPN):
SMTP 25 IMAP 143 SMTPS 465 ?? 587 IMAPS 993
Outlook somehow detects it needs mx3.isource.nl for sending and receiving emails. I've changed that to sinnema.synology.me which translates to 22.214.171.124.
It doesn't make any difference if I use SSL/TLS or not, Outlook can't connect to the server.
This is how it is configured in Plesk at the moment: