Your Email Program Is Using Outdated Address On Outlook 2016 For Mac

Using Outlook 2016. Here are a few tips for using Outlook 2016 with address@example.com setup as an IMAP account: Your account name will be listed in the left-hand column of the window. If you connected your Outlook.com account to Outlook 2016 or Outlook 2013 before the upgrade, you’ll need to reconnect it to ensure the best experience. If you don't reconnect your upgraded email account, you won't be able to send or receive Outlook.com email via your desktop version of Outlook 2016 or Outlook 2013.

Office 365 Admin Microsoft 365 Business Last updated 2015-10-23 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 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 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. • 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. Office 365 for mac switch user.

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 copy of your message to a bad email address. 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. Solution 4: Make sure your email account wasn't compromised Did you send the original message at all? If not, it’s possible that a spammer or someone else inappropriately used your email address when they sent the message.

Check your Sent folder for any messages that you know you didn’t send. If you find any, it’s possible your email account was compromised. To resolve this problem, do the following: • Change your email account password. Make sure you use a strong password. • Run an anti-malware scan on your computer. 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 be backscatter, and you can ignore it.

Here's what backscatter is: Spammers often falsify the From address of spam by using email addresses they’ve collected from the Internet instead of their own address. If one of these spam messages can’t be delivered, an email server might send an NDR like the one you got, back to the From address. Such an NDR is useless rubbish because it creates the false impression that you did something wrong. This type of useless automated message is called backscatter. It’s annoying, but if it’s backscatter, your account hasn't been hijacked. Check your Sent folder for messages that you know you didn’t send. If you don’t see any suspicious messages, it’s likely that the NDR you received is backscatter.

If you’ve already changed your password and run an anti-malware scan, you can ignore these backscatter NDRs. To learn more, see. I'm the email admin. What can I do to fix NDR 5.1.1 to 5.1.20 issues?

If the steps in the section don't solve the issue for the sender, the solution might be related to the way the user'sOffice 365 account is set up. If you have a hybrid topology, the solution might also be related to the on-premises mail transfer agent. It might also be a problem with the recipient’s domain configuration. Here are 4 solutions you can try. You might not need to try all of them to get the message sent successfully.