The MX record for a domain that's enrolled in Exchange Online uses the syntax
No, create an account now. Nice to have you here! In such cases, the email would fail to deliver to the recipient and would be bounced to the sender, with the error ‘550 5.1.1 : Recipient address rejected'. The reason for this error is that your email server is configured to require SMTP authentication to send outgoing mail, which is a way an email sender can be authorized. https://bobcares.com/blog/how-to-fix-550-5-1-1-user-unknown-email-error-in-exchange/
Please try the request again. Make sure that Use same setting as my incoming mail server is selected. MORE ABOUT BOBCARES Related Posts ‘550 5.1.1 User unknown' - How to fix this email error in Exchange, Postfix and Qmail serversThe curious case of Google tagging all mails as spamHow Check with your domain registrar or DNS hosting service to verify the MX record for your domain is correct.
For instance, the MX records for the domain could be wrongly resolving to the recipient mail server instead of its intended server. Since senders use email clients such as Outlook or Thunderbird to send mails, they will see the message in their email clients. Also check that the domain is resolving to the correct server from your end and the routing is fine, using ‘dig' and ‘trace route' tools. Start typing the recipient's name or email address until the recipient appears in the drop-down list.
Click OK. Select the recipient in the drop-down list by moving the cursor on the recipient without clicking or by using the Down Arrow and Up Arrow keys. Though this error is common in Exchange and Postfix, users who send to these servers may see the error, even if they are in other mail servers. Click Next.
Subject '...', Account: 'tam', Server: '192.168.1.101', Protocol: SMTP, Server Response: '550 5.1.1 <[emailprotected]> User unknown; rejecting', Port: 25, Secure(SSL): No, Server Error: 550, Error Number: 0x800CCC79 Q: anyone have experience this? 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 Note: Some ISPs have configured their SMTP servers to never allow sending messages from another network. Let us help you.
Style Default Style Contact Us Help Home Top RSS Terms and Rules Copyright © TechGuy, Inc. https://support.microsoft.com/en-us/help/2784785/-550-5.1.1-resolver.adr.exrecipnotfound-ndr-error-message-when-you-send-email-messages-by-using-outlook-in-office-365 Lock the suspicious email account without delay and change the password to a strong one. Click Accounts. Derek Curtis (November 30, 2016 at 2:35 PM) Reply to this Feedback Add Feedback Was this article helpful?
Close Login × Not Logged In You must be logged in to perform this action. navigate to this website In the E-Mail Name Resolution section, choose Clear Most Recent Recipients List, and then choose OK. To confirm the MX records for a domain, use the command: dig domain.com MX DNS issues can also happen due to wrongly set DNS records such as wild card entries for are crucial in email error debugging.
Use the Down Arrow and Up Arrow keys to select the recipient, and then press the Delete key. For example, it might be pointing to a mail server that isn't valid. Loading... More about the author LEARN MORE BUILD YOUR PLAN Managed SupportFeaturesHow Support WorksSupported TechnologiesPricingSupport ChannelsHelp Desk SupportPhone SupportLive Chat Support CloseDedicated Support Bobcares support engineers work exclusively for your company, maintaining high service uptime and
Certain mail servers have outbound mail filtering configured in them, which can block the emails going out from it, and leading to email rejection messages. Sometimes a typo in the address can often lead to emails bouncing. We're here to help you with any queries.
Spam filters are major tools that block emails. LEARN MORE SUPPORT PLANSHire Support EngineersOverviewFeaturesHow We WorkSupported TechnologiesSupport Plans Close CloseInfrastructure Management Bobcares keeps your servers secured and optimized, so that your customers get reliable service 24/7. i seem to be able to send to anyone, even to other colleague, but i can't send to that specific user(within the company too). In this case you can ask the administrator of the network you are connected to (in our example that would be the administrator of the hotel network) for their SMTP server
Verify that the emails are routed to the correct server and not any remote servers. We'll assume you're ok with this, but you can opt-out if you wish.Accept Read More Login Home Knowledge Base News Tickets Community "550 Authentication is Required for Relay" when Sending Email Yes No Great! click site Tech Support Guy is completely free -- paid for by advertisers and donations.
Why did I get a non-delivery report? TALK TO AN EXPERT NOW! john (November 28, 2016 at 3:21 PM) John - not sure why that would be unless you're running mail through a gateway of some sort. Solution 4: Update forwarding rules to remove incorrect addresses Sometimes the NDR is caused by a recipient that the user didn't directly send mail to.
If the person does have such a rule, they will have to either correct the email address or remove the rule in order to prevent NDR 5.1.x errors. Verifying senders can include checking SPF records to RDNS. Home Blog Emergency About Us Contact Us Client Area Cart MenuTechnical SupportManaged Support We manage your help desk, live chat and phone support for one low fixed price per month. It might also be a problem with the recipient’s domain configuration.
Show Ignored Content As Seen On Welcome to Tech Support Guy! Article ID: 2628, Created: January 13, 2013 at 7:40 PM, Modified: March 10, 2016 at 3:12 PM Feedback Add Feedback I followed these steps and it worked now I can send