senders of e-mails to me receive message not accepting requests

Question

certain senders of e-mails to my e-mail address receive a message that my e-mail is not accepting connection requests

Answer 1

Hi,

Thank you for sharing your question. I understand how confusing and concerning it is when certain senders tell you that your email address is “not accepting connection requests,” especially when you are still able to receive email from others. It’s completely reasonable to want clarity when messages fail before they ever reach your mailbox.

This behavior typically means that the sending mail server is being actively refused or blocked when trying to connect to your mail system. Microsoft explains that this can happen if your account or the domain hosting your mailbox is blocking specific senders, or if there is a configuration or filtering rule preventing their messages from being accepted.  In some cases, the sender receives this type of failure because the receiving mail server cannot accept the connection at all, which can be related to blocking lists, incorrect mail server settings, or security filtering at the domain level.

To resolve this, check your mailbox settings to ensure none of the affected senders or their domains are accidentally blocked. If your mailbox is part of Microsoft 365, you may also want to confirm that your address isn't listed on any internal blocked sender list or that no mail flow rules are affecting their messages. Asking the senders whether they received a bounce‑back or non‑delivery report (NDR) can also help, because the detailed error message usually reveals the exact reason their server cannot connect.

To help narrow this down further, could you tell me whether all messages from these senders fail, or if it happens only intermittently?

Feel free to follow up  I’m here to help you get your email working reliably again.

 

I hope this helps.

 

Best Regards,

Noel

Answer 2

If certain senders are receiving messages indicating that your email is not accepting connection requests, it could be due to several reasons. One common cause is that your email address may be configured to block messages from specific senders or domains. This can happen if your email settings have been adjusted to restrict incoming emails from certain sources.

To resolve this issue, you can check your email settings to ensure that there are no restrictions placed on the senders in question. Additionally, if your email is hosted on Microsoft 365, you may want to verify that your account is not on a blocked senders list, which can prevent emails from being delivered.

You can also ask the senders to check if they are receiving any non-delivery reports (NDRs) when they attempt to send you emails, as these reports can provide more specific information about why their emails are not being accepted.

For further assistance, consider reviewing the troubleshooting steps for external senders trying to send emails to Microsoft 365 recipients, as they may provide additional insights into the issue.