Hi, On 2015-04-04 at 21:52 Muhammad Yousuf Khan wrote:
my submitting port is set to 465. there are only 2 ports listening under Postfix process. 25 and 465 In any case either change the smtpd_tls_policy_level to 'may' or configure the client failing to use STARTTLS. my smtpd_tls_policy_level is already set to "may". can you please explain "or configure the client failing to use STARTTLS."
The contents of your master.cf are also important here - I guess the policy/config is overridden there.
Cheers, Mathias.