Just got BT Infinity today. Internet connection speeds very good, but slow to connect to mail servers. Slower than the old Pipex ADSL mail server connection!
We have PCs and MACs. Setting up PC Mail with Outlook Express was OK but took a little tweaking to get the settings absolutely right. The details provided to set up mail on MAC Mail OS X were completely different and what's more didn't work at all. In the end I resorted to setting up the same as Outlook and this eventually worked.