Share via

Emails stuck pending randomly with this error message Reason: [{LED=450 4.4.317 Cannot connect to remote server [Message=550 Too many invalid recipients] [LastAttemptedServerName=xxx-xxx.xx.xx]

Anonymous
2023-06-02T18:32:17+00:00

Emails stuck pending randomly with this error message.

Reason: [{LED=450 4.4.317 Cannot connect to remote server [Message=550 Too many invalid recipients] [LastAttemptedServerName=xxx-xxx.xx.xx]

Google and bing not helping, trying here.

This message was sent from a user to an external contact. No issues before today. No config change, nothing.

Microsoft 365 and Office | Install, redeem, activate | For business | Other

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

0 comments

2 answers

Sort by: Most helpful
Most helpful Newest Oldest
  1. Anonymous
    2023-06-05T07:44:42+00:00

    Hi Dominic Gauthier,

    Good day.

    Hope you are doing well, I am writing to follow up on this thread.

    As per your mentioned description, before moving forward, may I please re-confirm whether you have hybrid or Exchange On-premise configuration in Office 365 to send or receive email message? I need to know this information to understand your particular situation.

    I will be waiting for your next update about it. Thank you for your kind cooperation and precious time.

    Sincerely,
    Darpan

    0 comments
  2. Anonymous
    2023-06-02T19:33:07+00:00

    Dear Dominic Gauthier,

    Good day! Thank you for posting to Microsoft Community. We are happy to help you.

    Based on your description, I understand that you have a query "Emails stuck pending randomly with this error message Reason: [{LED=450 4.4.317 Cannot connect to remote server [Message=550 Too many invalid recipients] [LastAttemptedServerName=xxx-xxx.xx.xx]" At this very moment, I am looking into whether there could be a possible solution to this issue. I will get back to you as soon as I get any additional information about your query.

    Your patience and cooperation are much appreciated.

    Sincerely,

    De Paul | Microsoft Community Moderator

    0 comments