1 in-house exchange server
accepts multiple domainname.com address (non of which referred to below is the primary domain)
mxlogic servers filter our incoming mail to us
domainsname.com hosted externally and those Name servers have correct MX records.
All was working until recent request to have domainname2.com website redirect to domainname3.com website sent to web person.
mail stopped(was intermittent) working to domainname2.com from external senders.
Could only get access today to update correct mxlogic records myself through hosted site.
Made change to exchange server to add primary smtp as domainame3.com but keep domainname2 working still through co name change.
Suddenly Hotmail/outlook(web mail off desktop) to @domainname2.com(original) is reporting below and almost immediately returning unable to deliver.
Gmail seems to work from cell.
Diagnostic-Code: smtp;550-Please turn on SMTP Authentication in your mail client.
550-col004-omc1s12.hotmail.com [18.104.22.168]:62234 is not permitted to relay
550 through this server without authentication.
Ideas? I hope I was clear enough...