MozillaZine

Mail Server Responded: 5.1.1 User Unknown

User Help for Mozilla Thunderbird
jfedele
 
Posts: 1
Joined: November 7th, 2007, 9:23 am

Post Posted November 7th, 2007, 9:27 am

I keep getting this error on some email addresses that are correct. Can anyone give me a clue as to what this is and any possible remedies.

Mail Server Responded: 5.1.1 User Unknown

Thanx,
Joe

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