thanks everyone , my only other question is if they have port 25 outbound blocked then why not make a client and server that uses a differing port , then just build this heavy encryption into it ....
the point being that i get why they block 25 cause of spammers but on htis type a system it woudl be mainly for actual use not some spam cause other email servers woudl then not get it as its all using differant ports....perhaps evne one that can be changed at will much as a sftp can shift its ssh ports