SMTP Server discovery (NOT SPAM)
Posted: Thu Jan 18, 2007 4:10 pm
background: I'm creating a blacklist checker, the user enters a domain or IP address and ithe script checks against several DNSBLs. This assumes the use knows what his/her mail server domain and IP address is.
Typically the mail server is setup on the server itself (so I believe) ... so i can instruct the user to enter the domain after the @ sign. This isnt always the case as there can be one mail server to hand mail for several domains ...
Is there a way to discover what the SMTP server is for a specific domain, or is this just impossible ?
Typically the mail server is setup on the server itself (so I believe) ... so i can instruct the user to enter the domain after the @ sign. This isnt always the case as there can be one mail server to hand mail for several domains ...
Is there a way to discover what the SMTP server is for a specific domain, or is this just impossible ?