Jeff Lasman wrote:
> We'd like to whitelist real hotmail servers. We've found we can't
> identify them from their spf records; they don't keep those up-to-date
> <frown>.
>
> Currently hotmail appears to be using only servers matching this:
>
> bay0-omcX-sYY.bay0.hotmail.com
>
> where "X" is a single digit and YY is either one or two digits.
>
> Is there a way to easily check for this in an lsearch (or perhaps some
> other kind of search) through a whitelist file?
>
> Or some other easy way to do it?
>
> Or some other method completely different, that doesn't rely on their
> published spf records?
>
Hello,
I do use this:
deny
message = Faked $sender_address_domain.
log_message = Fake hotmail
senders = *@hotmail.com : *@msn.com
condition = ${if match {$sender_host_name}{\Nhotmail.com$\N}{no}{yes}}
It is not 100% safe as many people could put a reverse DNS pointing to
hotmail, but it is better than nothing.
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