Imap setting for Synology Mailserver

hi
i want to use imap to connect to my Synology Mailserver but doesn’t work

for Host i use the myfritz adress , or the ip , both doesn’t work
For testing I used times in Thunderbird and there it works

thx

Solution:
you must use
image

Yes, the port and security policy pairs are specific. If you want to set them manually, they are as follows:

SMTP
Port 587 = Force usage of SSL/TLS
Port 465 = Use SSL/TLS on special port (legacy)
Port 25 = Use SSL/TLS if available

IMAP
Port 993 = Use SSL/TLS on special port (legacy)
Port 143 = Use SSL/TLS if available

POP3
Port 995 = Use SSL/TLS on special port (legacy)
Port 110 = Use SSL/TLS if available