Unable to send from exchange to person, but can send from AOL

G

ghutnick

I keep getting the below error when I try to send to a particular person
outside my firm. I can send from AOL and it gets through. Is this some type
of GREYLISTING and how can I get around this?

Delivery failed after 1 attempts within 0 hours and 0 minutes
550 Not supporting null originator (DSN)


No recipients were successfully delivered to.
 
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