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  1. #1
    New Lounger
    Join Date
    Dec 2009
    Edmonton, Alberta, Canada
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    Angry Outlook sending problem

    Outlook 2010 on Windows 7 computer. Outlook just re-installed. It sends test messages just fine. It sends email within it's own email group fine. When you try to send to another mail server the error message "Server error: '550 <******> No such user here". Receives mail fine but even a "reply to" gets the same error message. Go in through webmail and thing work fine. All other users are on webmail - this is the only machine on outlook with this mail server.

    I have confirmed all the email settings. Nothing is stuck in the outbox. I've run sfc/scannow - no errors. I've run virus scanners - all clean. I've tried redoing the email settings & new user - no joy in mudville.

    What next??

  2. #2
    Super Moderator
    Join Date
    Jun 2011
    New England
    Thanked 727 Times in 640 Posts
    It's an ISP issue (not specifically Outlook): You receive a SMTP relay blocks error message when you send e-mail messages in Outlook

    E.G., the sender's domain does not match the outgoing server's domain: I receive a 550, 553, or relay-prohibited error when sending e-mail messages

    But there are some other mismatched conditions (mainly DNS issues) which can cause the same error: Fixing the 550 No Such User Here email error
    Last edited by BruceR; 2016-04-18 at 23:38.

  3. #3
    WS Lounge VIP
    Join Date
    Dec 2009
    Thanked 1,125 Times in 1,048 Posts
    As webmail works it would appear to be a sending password issue. Check that the SMTP server settings are correct and that you have a user name and password.

    cheers, Paul

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