I have been with BigPipe for a few months now (on VDSL), no complaints, speed is fast, email support is quick, however I have been trying to setup a couple of servers (2012R2, SBS2011) with a domain from GoDaddy, and whilst most things are working (receiving email, remote connectivity to SBS, etc.) I am struggling with sending emails.  I have researched this and know it is due to (one of two?) things:

PTR Records
Reverse DNS

I have read that the ISP is responsible for setting these up, and without them email will either bounce (like from hotmail) or be marked as SPAM.  I have asked BigPipe to help, but they have come back saying this is "beyond our current support policy", and services such as "mail server, VPN, Game Servers, correct DNS resolution to hosted websites, etc are not current supported".

Does anyone else on BigPipe run a mail server like Exchange?  if so, how did you get around this?  Is there something I can do to set up the PTR and reverse DNS myself?

I do have a public IP.
I do not (yet) have an SSL certificate (but that shouldn't matter).

My knowledge in this area is limited so would appreciate any help :-)