Email Error 550 5.1.1
delivery issues for error code 5.1.1 through 5.1.20 in Office 365 Applies To: Office 365 Admin, Less Applies To: Office 365 Admin , More... Which version do I have? More... This topic can help you fix email problems that are associated with error codes 550 5.1.1 through 5.1.20 if you see this in a non-delivery report (NDR). Mail flow problems can be frustrating, but we have solutions you can try in order to get your message sent. I sent a message, what can I do to fix this? I'm the Admin, what can I do to fix this? Why did I get a non-delivery report? I sent a message and got error code 5.1.x in an NDR. What can I do to fix this? Here are 5 different solutions you can try. You might not need to try all of them. If the steps here don’t help you to successfully send the email, then contact your email administrator and refer them to the administrator help section of this topic so they can help you. Solution 1: Make sure the recipient's email address is correct This is the most common issue that causes 5.1.x errors. Check for correct spelling. If you change something, send the email again. Solution 2: Remove the recipient's email address from the auto-complete list Remove the recipient’s email address from the list of suggested names in the auto-complete list, then type it again before trying to send the email. The auto-complete list is a list of suggested names that shows up in your email program when it finds a name that matches what you have typed on the To line. If you need more detail about this, see Remove suggested name or email address from the Auto-Complete List in Outlook Web App. Create a new email message. In the To field, start typing the recipient's name or email address until the recipient appears in the drop-down list. Use the Down Arrow and Up Arrow keys to select the recipient, and then press the Delete key. Type the recipient’s complete address and then send your message. Solution 3: Make sure the recipient doesn't have an email message forwarding rule in place Did you send the original message to exactly the same recipient address that is shown in the NDR? You can verify this by comparing the address provided in the NDR with the address shown in the original message that is in your Sent folder. If the addresses don't match, contact the person you sent the original message to and ask them if they have an email rule to forward messages and ask if they know it's working correctly. Their rule could have tried to send a c
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2008. SimonH New Member Hi there. I have hunted these forums already, trying to find a solution to this problem. Although I've found threads detailing similar problems, none seem to be like this one. Essentially, we have a problem with *some* people emailing users on our server. For the most part, mail works flawlessly, and we don't have any problems, but occaisionally, we find that some people just cannot email users on our server, no matter how hard they try, they get a bounce message like this (email addresses and hostnames have been changed to generic value's); ----- The following addresses had permanent fatal errors ----- <[emailprotected]> (reason: 550 5.1.1 <[emailprotected]>: Recipient address rejected: User unknown in local recipient table) ----- Transcript of session follows ----- ... while talking to ispconfig.hostname.: >>> DATA <<< 550 5.1.1 <[emailprotected]>: Recipient address rejected: User unknown in local recipient table 550 5.1.1 <[emailprotected]>... User unknown <<< 554 5.5.1 Error: no valid recipientsClick to expand... The thing I find strangest about this, is that [emailprotected] (the proper users email address on the ispconfig server) seems to be getting converted to [emailprotected]name. ie. the domain name part of the email address is being converted to the hostname of the ispconfig server. I'm not sure if this is relevant, but it seems strange to me. If I try to test this by sending an email from my personal googlemail account to the same email address, the mail goes through fine, and I cannot replicate the issue the senders are having. It happens with multiple unrelated accounts, and multiple unrelated domains on the server, with multiple unrelated users with different ISP's sending the emails. Some users never have the problem at all, other users seem to have it a lot. I really don't know where to start with this. Adding to the problem