Hey Jamie
In Webmin Postfix Configuration - SMTP Client Options - Use TLS for SMTP appear in 2 fields :
- Yes or No for fist one --> The configuration file /etc/postfix/main.cf is correctly updated --> OK
- Snd one : Field propose "Default, Never, if requested by the client, Always .... --> The configuration file /etc/postfix/main.cf is NOT correctly updated !!!!
Perl script smtp.cgi have to be upgraded and i propose to you a solution in the joined file here.
Best regards
Didier SIMON