recently I got installed SSL certificate on my domain but then I simply cannot send emails via roudncube. I can loggin and receive emails but I cannot send. When I try to send I get error (-1) - cannot connect to SMTP.
This is what I got from server guy who is working on the issue
Well, after few hours of literally f** with virtualmin, I got something but almost nothing. I found out that this problem is related to SSL installation. When I applied SSL to the domain it modified Postfix config file to the version which is simply not working. There were multiple records created in the config file which were conflicting with each other - creating multiple smtp connections. I removed extra one, postfix started, but I still see this error when try to send email.
I will continue checking tomorrow, but I think it may be faster to ask virtualmin support to help, unless it magically resolves (check on your end?). I just cannot understand what a sort of software this is which can be screwed with 3 clicks SSL installation.