You seem to do a lot of logging but present no information what that tells you. What module parameters bring it to hang? Or is it independent of the parameters? Does it run in an endless loop or in a wait state?

Check with a network sniffer if it tries to contact the SMTP server. Check with strace if it hangs in a system call. Check with the perl debugger, if and where it hangs in the perl code

In reply to Re: Mail::Sender hangs once in a while by jethro
in thread Mail::Sender hangs once in a while by MichaelMeyer

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