Hi everyone ,
An e-mails were working fine with the direct internet access but when the TMG implemented as a proxy server and all the clients are connected by this proxy , the e-mails can not send or receive ; in addition we can not establish telnet session from the client side even we created TMG rule to allow accessibility from internal network to external network and the set domain including the name of domain mail ! by e-mail protocol SMTP ,IMAP,POP ,DNS,.... so on
so my question is shall we need to create any additional TMG rule to allow this traffic
Edward