I have setup spf in postfix and found that it almost killed my server
raising the iowait at more than 90% putting the server on its knees.
If i disable the spf filtering then the server is happy and
everything works fine.
I think that maybe the iowait is due to the delay that exists in the
DNS replies to the SPF process, my server recives more than 100k
mails on a daily basis, and i have a caching DNS on this same server.
So my question is:
Has anybody found this kind of problems on their servers, and if
postiive how you solve it ?
==================================
Adrian de los Santos
demon(_at_)demon(_dot_)com(_dot_)mx
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