Hello, we are using qpsmptd 0.32. Now the mail from cbsig.net is blocked by require_resolvable_fromhost plugin . As this domain's mail is coming from more than a server I can't set the whitelist for a particualr IP address. These are some of the logs of my qpsmtpd:
logterse plugin: ` 64.30.237.62 proxy1068-fe.tm.cbsig.net proxy1068.tm.cbsig.net require_resolvable_fromhost 902 Could not resolve proxy1068.tm.cbsig.net (#4.4.3) logterse plugin: ` 64.30.237.85 proxy1052-fe.tm.cbsig.net proxy1052.tm.cbsig.net require_resolvable_fromhost 902 Could not resolve proxy1052.tm.cbsig.net (#4.4.3) logterse plugin: ` 64.30.237.177 proxy1053-fe.tm.cbsig.net proxy1053.tm.cbsig.net require_resolvable_fromhost 902 Could not resolve proxy1053.tm.cbsig.net (#4.4.3) logterse plugin: ` 64.30.237.2 proxy1061-fe.tm.cbsig.net proxy1061.tm.cbsig.net require_resolvable_fromhost 902 Could not resolve proxy1061.tm.cbsig.net (#4.4.3) logterse plugin: ` 64.30.237.178 proxy1055-fe.tm.cbsig.net proxy1055.tm.cbsig.net require_resolvable_fromhost 902 Could not resolve proxy1055.tm.cbsig.net (#4.4.3) You can see that everytime it is sending mail from different servers, so I am not able to whitelist a particular IP. I tried the dig command of each proxy* servers the IP was resolving. Also I tried the dnsmx command and got the result as follows : # dnsmx proxy1055.tm.cbsig.net 0 proxy1055.tm.cbsig.net When I tried to run the dnsmx command for the domain it returned # dnsmx cbsig.net 10 mail.cbsig.net Is this problem happens because of MX record ? Please tell me why this happens and how we can solve this issue. Thanks Abhilash.S