dtarra
asked on
Exchange 2007 NDR
Two examples of error message below...
nlpi091.prodigy.net #553 5.3.0 nlpi091 - m9MISBuE005317, DNSBL:521< 63.166.65.132 >_is_blocked.__For_informa tion_see_http://att.net/blocks ##
ejf@intrinsic.net
mhb-03-ord.mailhop.org #550 Relaying denied ##
We are getting the above error when sending email to a few email addresses. Any idea as to why this is happening. We just upgraded to Excahnge 2007 and did not have this problem on Exchange 2003.
nlpi091.prodigy.net #553 5.3.0 nlpi091 - m9MISBuE005317, DNSBL:521< 63.166.65.132 >_is_blocked.__For_informa
ejf@intrinsic.net
mhb-03-ord.mailhop.org #550 Relaying denied ##
We are getting the above error when sending email to a few email addresses. Any idea as to why this is happening. We just upgraded to Excahnge 2007 and did not have this problem on Exchange 2003.
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