Monthly Archives: January 2018

Undocumented Change in 2016 MessageID header behavior

Posted on January 15, 2018 by mell9185

At my company, we recently migrated from 2013 to 2016, but had to keep a 2013 footprint around for support of older Blackberry 5 devices. In our environment, we have a SendMail farm that is an internal open relay as … Continue reading →

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