We need an urgent fix to our webmail feature. We run webmail software on our site where people can sign up for a free email account similar to gmail, yahoo, etc.
At the moment emails are going to our catch all account but not getting delivered to the users.
We have phpmail3 installed. Please note that our normal pop3 company emails set up in Outlook are working 100% and we just have a problem with the webmail emails not getting delivered to registered users.
You need to have very good knowledge of webmail software and mail servers please.