Mass Email Time Out

 Q- I send out 23,000 emails every night through the Mass Email utility program.  I always get a message like "18 message(s) had errors. Do you want to view the error log file?" at the end of processing. See attached sample below:



If I click "Yes," then I see a log showing the following error message every 10 minutes:  
Service not available, closing transmission channel. The server response was: 4.4.1 Connection timed out
See sample screen below.



How should I resolve this time out problem?

A - According to Microsoft, the way to fix this error is to make a configuration change to the Exchange Server.  The procedure to change this Receiver-Connector ConnectionTimeout setting is documented here:

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