Hi,
There is no CA certificate, so fetch mail will not do verify steps if
server could be trusted or not, however you own the DS server, so you
know it could be trusted, the only difference is that if it verify and
pop out warning that it is a trusted server or not, either way you
could continue use it and the communication establish between pop 3
server and mail server will be encrypted and SSl will work, it is like
self signed certificate will encounter this not trusted warning also,
it does not mean the communication between is insecure or SSL is not
working.
Even you have a CA certificate, if the client does not trust the
server certificate, it will still pop out the warning ask you if you
like to continue, since pop 3 mail server could be different and is
not fixed, it is fine and does not mean that mail being fetched
insecurely.
Previous version does not print out the log and it is an issue it
print out the waning in this version which we will update in the
future DSM firmware.
Please note that we had confirm with developer that the design is the
same as previous version and design in this area is working same as
before, difference is that waning pop out this version and previous
version did not, and this will be updated.
Thank you.
Best Regards