Outlook 2003 email issue

geekgal

New Member
I have an smtp account set up in Outlook 2003. There are 5 others with similar accounts (ex: [email protected], [email protected], etc). We can no longer send to each other from our business email accounts through Outlook. We get a 550 error upon send attempt, user not valid. We can log directly into the server and send between these accounts with no problem. We can send to these accounts from other email providers (ie gmail or hotmail). The problem only occurs when sending from one ([email protected]) to another ([email protected]) using Outlook. Any ideas what the solution is?
 
yes, it worked fine for years, then one day just started sending the 550 error upon sending to another recipient with the same email suffix.
 
Can you send emails from lets say a yahoo or gmail account to your business account? If not maybe your domain subscription expired... You didnt change any IPs internally or externally did you?

Sorry it took so long for a reply I don't log in everyday.
 
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