Sorry, this was me having a rant but is nothing to do with the lgfl2 content of this thread so I shouldn't have posted it. It's been one of those days!
FYI from this particular site (nothing to do with lgfl), all recursive dns requests from clients are blocked, submission/587 - No chance, IMAP won't work due to DNS being blocked and IMAP closed off at the firewall in any case. The requested port was for some offsite backup software to obtain a license from a central server.
Anyway, apologies for the slight thread hijack. Back on track!