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On Wed, 27 Mar 2013, Richard Laager wrote:

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).

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

:-|

Does anyone have any idea why the 15 second IO::Socket::INET timeout
isn't applying in these cases?

tar-pitting? IMHO, the timeout kicks in when there are no TCP alive packets. But when the other partner sends keep alive packets, but does not respond simply.

- -- Steffen Kaiser
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