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Diagnostic-Code: smtp;550 5.1.8 Access denied, bad outbound sender AS(42004)

Wendy Elliott 0 Reputation points
2026-02-27T09:23:45.3366667+00:00

Hi, my emails are being blocked from being sent, I think I exceeded the limit as I was sending payslips to employee's can you help please

Microsoft 365 and Office | Other
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  1. EmilyS726 211.2K Reputation points Independent Advisor
    2026-02-27T13:27:41.9566667+00:00

    Hello

    Is this an outlook.com address, or a work email address?

    Is this the full bounce error message? If not, can you please share the full message as the message is very generic. Please remove any private information when you share.

    Thanks!!

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