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mailserver with dynamic ip

bce
hi folks,

i´ve finally put up my own mailserver. everythings works fine and it isn´t an open relay. but there´s still a problem:

i can´t send mails to @t-online.de
i know that they protect them against spam. but i have a full qualified domainname and a dyndns provider. So that i can recive mails without any problems. 
I can´t realy understand what the t-online mailserver does. if it checks my sender domain it´ll get my sender ip.
is it maybe that they do a reverselookup (ping -a ip)??

is there any knows issue? how to fix this problem without using a smarthost?


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    It's probably a reverse lookup issue. An increasing number of service providers are starting to do this, due to the spam problems.  The theory is that if you don't have a reverse DNS setting, you're in the same league as spammers.
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  • 0
    It's probably a reverse lookup issue. An increasing number of service providers are starting to do this, due to the spam problems.  The theory is that if you don't have a reverse DNS setting, you're in the same league as spammers.
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