Using smtp config of:
and I get this result:
Using stored SMTP server info...
Found conf/smtpsrvs file...
2022-09-02T14:29:34| Opening port 465 for SMTPout-465 service...
TLS Module ::: The e-mail server [smtp.ionos.com] is not reachable at port 
Firewall rule SMTPout-465 closed.
However, if I test using an ncat connection, I get this:
ncat --ssl smtp.ionos.com 465
220 perfora.net (mreueus002) Nemesis ESMTP Service ready
which connects to the mail server using SSL/TLS with no problem? I also verified the esxi firewall rule is enabled to allow 465. Why is xsibackup failing to connect to the smtp server?