"Erik Hensema / HostingXS" <[email protected]> wrote:

However, in some (rare) cases relays are blocked even though there are
whitelisted and not blacklisted on any blacklist.
I can't see how this can be caused by my filter code.

Does it check external nameservers that might not be responding?  What
does your code do on timeout?  Is the relay blocked 450 or 550?

Joseph Brennan
Columbia University Information Technology


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