This is unrelated to the other thread. I'm troubleshooting an issue where md_check_against_smtp_server() intermittently hangs for 5 minutes. It's *always* 300 seconds exactly (ignoring sub-second precision).
The error is always the "returned an empty response" from get_smtp_return_code(). I'm using this function for doing callbacks against the sender's address. I look up the MX records using Net::DNS. Before you hate me too much, I cache positive responses for 7 days and negative responses for 1 hour. The delays discussed above are around the actual md_check_against_smtp_server() call and *nothing else*. To get this far, I had to instrument my filter with logging before and after every non-trivial block of code. Does anyone have any idea why the 15 second IO::Socket::INET timeout isn't applying in these cases? Thanks, Richard
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