Email configuration help with Nextcloud Mail

[ianhyzy]

I have Thunderbird working fine connecting to my mail server, but I can't get Nextcloud Mail to connect with the exact same settings. IT reports that the server doesn't support TLS:

Roundcube also reports that SMTP does not support STARTTLS

But on a whim, I tried anyway, and it worked?

But thunderbird connects fine with the same settings - I can send and recieve mailm and SPF/DKIM/DMARC is all good:

[girish]

@ianhyzy Yes, the explanation for this behavior is here - https://docs.cloudron.io/apps/nextcloud/#email (at the bottom). Happy to clarify further.