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Server Error: 550 5.1.1

Although the recipient's email address is the same, other internal identifiers for the recipient might have changed, thus making the cached entry for that recipient not valid. Join and Comment By clicking you are agreeing to Experts Exchange's Terms of Use. Solution: Verify the MX records for a domain, using the command: dig domain.com MX If you notice DNS errors or missing MX records, then contact the recipient server support and get The other variant for the error ‘550 5.5.1 : Recipient address rejected' are: 550 5.1.1 : The email account that you tried to reach does not exist 550 5.1.1 : User unknown have a peek here

That’s where a bulk email verifier comes into play. I'd be ok sending it privately, if it matters. The recipient doesn't have the email address that you're sending to. 3. the domain name part of the email address is being converted to the hostname of the ispconfig server.

Apologies if I've missed a thread on this, and please feel free to point me in the direction of it if one exists. Updating the recipient address to a non-existing address, can show error ‘550 5.1.1 User unknown‘. An example is the ability to programmatically talk to Microsoft Outlook.

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  • Many Thanks In Advance, Simon SimonH, Nov 17, 2008 #1 _X_ New Member To clear thing out: 1) [emailprotected] sends mail to [emailprotected] hosted on your ISPConfig server and [emailprotected]

An expensive jump with GCC 5.4.0 more hot questions question feed about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life Senders sending mails from other servers such as Exim, Postfix, etc. Solution 5: Make sure the NDR is related to a message you actually sent    If your Sent folder contains only messages you know you sent, then the NDR you received could The primary record points to the customers own Exchange server, the ISPConfig server is a backup MX (and therefore has a lower priority).

For example, the user's mailbox could have been deleted and recreated, or migrated from Exchange Online to on-premises Exchange. b. I have POP3 account type. Stay logged in Sign up now!

Talk to our technical support specialist today to know how we can keep your service top notch! Solution: Examine the email logs and confirm if any spamming is happening in the server. Your other points are all correct, yes. How could I have modern computers without GUIs?

Our services include Hosting Support Services, server support, help desk support, live chat support and phone support. https://bobcares.com/blog/how-to-fix-550-511-recipient-address-rejected-error/ Consult the webmaster if you see any errors in the resulting list. Run an anti-malware scan on your computer. Verifying senders can include checking SPF records to RDNS.

The person or mailbox you're trying to send your message to has a rule set up to forward messages to another address, but the rule isn't working properly. navigate here GET STARTED LEARN MORE Hire Support EngineersOverviewFeaturesHow We WorkSupported TechnologiesSupport Plans CloseManaged Support We manage your help desk, live chat and phone support for one low fixed price per month. Email filters set for the domain Some recipient mail accounts can have email filters or forwarders set. Bobcares provides Outsourced Hosting Support and Outsourced Server Management for online businesses.

Still need help with error code 5.1.1 to 5.1.20? Issues with sender server The 550 5.1.1 error can be caused due to issues at sender server too: a. 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 Check This Out ie.

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 Mail flow problems can be frustrating, but we have solutions you can try in order to get your message sent. Promoted by Recorded Future Are you wondering if you actually need threat intelligence?

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However, there are things that are likely to be true, and we are going to talk about them. Sender email account hijacked If there are numerous bounce messages noted in the mail logs, it can denote that someone is using the sender email account for spamming. Solution 1: Make sure the recipient's email address is correct    This is the most common issue that causes 5.1.x errors. Debian is fully up to date.

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 I don't see how, but could this be something to do with the problem ? WordPress server optimization - How to tune your server for a lightning fast website Related Posts How to fix ‘550 5.1.1 : Recipient address rejected' error in Exchange and Postfix serversThe http://idroprofessional.com/server-error/server-error-721.html It was around 10 months ago, now.

c. etc. 2) [emailprotected] sends mail to [emailprotected] and mail is delivered with no errors [emailprotected] exists in /etc/postfix/virtusertable ? There are couple of things that could have caused this error: The recipient address does not exist: you may possess an outdated email that was valid at one time. Such an NDR is useless rubbish because it creates the false impression that you did something wrong.

Delete the recipient by choosing Delete or by pressing the Delete key. To do this, open the mailbox in a web browser that supports only the light version of Outlook Web App, and use the following procedure: Remove all recipients Open the user's It is possible that an email address that once existed, gets deleted or moved from the recipient mail server. If you find any, it’s possible your email account was compromised.

LEARN MORE CONTACT US ServicesServer ManagementServer AdministrationEmergency Server SupportLinux Server ManagementWhat We DoSystem Software ManagementServer/Application InstallationIssue TroubleshootingServer HardeningPerformance TuningServer MonitoringEmergency SupportDisaster Recovery ManagementData MigrationDevOps CloseDesign and Development By strict adherence to A missing alphabet or an incorrect character can end up messing an email address. When you do, you receive a "550 5.1.1 User unknown" error . The person or mailbox you're trying to send your message to has an email setting called an MX resource record that isn't up-to-date.

SimonH, Nov 17, 2008 #9 falko Super Moderator ISPConfig Developer What's in /etc/postfix/main.cf?