Can't Send email with Apple Mail. Settings are all correct.
For some weird reason, Apple Mail will no longer send outgoing messages. I've quadruple checked my SMTP settings and everything is correct. Receiving mail works fine. When I downloaded and installed a new email client (Spark), I used the same settings without problem. Sending mail via Spark works as expected. My email/web host is out of ideas on what now to do. Anybody else run into this problem? And yes, I've restarted my 2021 iMac many times. MacOS is up to date. Thanks.
iMac 24″, macOS 12.5