I have the following problem - when trying to check SPF it looks that Exchange attempts to resolve an IP of user that sent an email, not an IP of mailserver that has been used.
X-Host-Lookup-Failed: Reverse DNS lookup failed for LocalIPOfUser (failed)
When I have asked customer to send an email to my own domain, it passed SPF correctly. Also SPF record of customer's domain is configured correctly.
Does anyone has any idea how to troubleshoot this issue?
We're using Exchange 2007 SP1
Thanks in advance
Please contact ISP and create SPF record for your domain --
=>Link to create the SPF record –
Sender ID Framework SPF Record Wizard
Sender Policy Framework
After creating the SPF record for your domain issue will be fixed.
MicroSoft Exchange Admin. & Connector EXCHANGE2010, MCSE, MCTS, MCSA MESSAGING, CCNA & GNIIT
Hello, I am sorry, but SPF for both my and remote domain has been created and is working correctly. This does not solves my problem. As mentioned (and as you can see), Exchange tries to resolve customer's end user IP (which is local intranet adress) to verify it with SPF record of customer's domain. Instead of it it should try to resolve used mailserver IP to verify it with SPF record of customer's domain. Am I right?