Mail.com started off ok, but is definitely unreliable. A while ago it seems to have just murdered a whole block of my emails - one month's worth. Disappeared without trace.
Today, another important email came in, and then disappeared as quickly as it arrived, without my even having a chance to do more than open it. Not in trash, spam or anywhere else.
Mail.com provide no contact details for you to get help. I did manage to find an email for them but got no reply or acknowledgement from them. So with mail.com, you're on your own when bad news strikes. I'll be looking to change from this strange and limited provider asap.