I am really new to virtulmin always used cpanel so excuse me for not knowing or describing my problem in fluent english. since last 5 days I am trying to install my joomla website to a new VPS from Contabo and making it work completely with virtualmin, tried several distros, and ended up with grade a supported Debian 9.
everything else I ended up configuring myself, .htaccess issues and folder permissions upgrading php to 7.02 etc.
how ever my problem is with postfix, dovecot IMAP/POP3 and postfix. I did clean install with the commands mentioned on the download page. I am able to send and receive emails from "read user emails" to my hotmail account.
installed roundcube email it always says "unable to connect to storage server" enabled config for thunderbird and outlook but I am unable to connect outlook have no idea what host name for incoming and outgoing mail and port is. outlook says unable to search auto config. in my joomla, I tried sendmail, phpmail and smtp nothing works. in my php info file sendmail_path is set to "/usr/sbin/sendmail -t -i " also tried it in joomla still × Error Test mail could not be sent.
I have no idea why sendmail has -t -i and whats wrong with mail.mydomain.com host or what to do next. any help or guideline will be greatly appreciated.
Thanks and Regards.