dsn error only to some domains

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dsn error only to some domains

Post by jshap82551 » Tue Dec 03, 2019 4:34 pm


Has anyone run into this before. Running Openemm 2013.

When sending emails to att.net, sbcglobal,net, bellsouth.net, or pacbell.net we get an error of dsn=5.2.0 in the mail log. Why are we getting this error?