How to fix 554 delivery error? | Problem Solved

How to fix 554 delivery error?

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One of the many incredible features of outlook is that users can send messages back and forth to their contacts. You only require a stable internet connection to text for personal or professional reasons alike. However, sometimes the messages might fail to go through. For such days, we bring you a detailed guide on how to fix 554 delivery error.

How to fix 554 delivery error?

If you’re having Http 504 AOL mail error then you can learn How to resolve Http error 504 AOL mail error?

What does it entail? 

Before you can even begin to fix this error, it is important to know the exact meaning of it. This error is caused due to an issue in the receiving server. It could be due to a mistake in the header or the ‘from’ part of the message. It is a generic delivery failure by a fault of the server.

Why does the 554 delivery error occur?

message not delivered


  • One of the primary reasons can be a bad network connection; it would be advisable to check if the network issue is due to your router or from the service providers’ side.
  • It can also be due to the presence of a spam filter which is causing a hindrance.
  • This can also be an issue to time, if the system and server time are not in sync.
  • If the mail was considered to be spam or in the block list.
  • It could also be that the domain or host failed to check.
  • If the mailbox was filled to its quota.
  • Another very easy to fix reason is if the message is too big. For this, you can try to break the file into parts and send them separately.

How to fix 554 delivery error? 


Here is a list of ways that a person can employ themselves and learn how to fix 554 delivery error:

  1. Change in settings

change in settings in outlook

  • On the side panel of the program, find the tools option and click on it.
  • Find the list of all the linked email accounts and choose the one that is facing this issue.
  • The box in front of the change existing email accounts should be tick marked.
  • Click on change and then proceed to settings.
  • These delivery issues are caused because of the server, which is why you should locate the outgoing server option.
  • Click on the ‘requires authentication’ option and double check that the incoming server is the same as the outgoing one.
  • Lastly, save the changes made and check if the problem has been solved or not by sending a mail.

 554 delivery error

  1. If the message is being shown as undeliverable, then firstly check that the address you have entered is correct and does not have any typos. Also make sure that the provider has not made any changes to their domain.
  2. If you are using the app, then try to change up and use the website version of the program and vice versa.
  3. In some cases, the user cannot do anything on an individual level to troubleshoot. For this, you can wait a while and see if the problem fixes itself over a period of time.

Customer service

Outlook has a well-established customer support which is equipped with walking users on how to fix 554 delivery error. If none of the methods given above are of help to you then, file in a complaint at the official support site of Microsoft.

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