I'm in the same position as Val,
My mail.com emails stopped working on my iphone a few days ago, after their 'upgrade'.
It was set on pop1.mail.com and smtp1.mail.com, for incoming and outgoing respectively.
After looking on this forum I tried pop.mail.com and smtp.mail.com, imap.mail.com and smtp.mail.com and imap.aol.com and smtp.aol.com, with variations of port 587 and the default 110 - none of these configurations work on my iphone.
I can see my mail.com emails via the internet, and interestingly I am still able to recieve emails via outlook, or rather microsoft live mail, which is more or less like outlook - and this was something I set up about a year ago, and it is still using the old pop1.mail.com and smtp1.mail.com configuration, even though mail.com themselves have posted different pop settings on their website, my mail.com emails are still coming through this successfully.
So now I am totally confused, I have sent an email to mail.com, but to expect a reply soon or even ever is wishful thinking, so I thought I'd post a message on this forum and share my woes, and hoping that someone may discover a way.
Thanks for reading.