Resolve 550 5.7.708 email bounce error

Kat Applewhite 0 Reputation points

Hi, I am getting this bounce back when emailing people within my own organisation. Please advise how to resolve. (I am the admin for my organisation but I'm not an IT guru!!) I am not on a trial licence. Thanks Kat

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  1. Aholic Liang-MSFT 13,821 Reputation points Microsoft Vendor

    Hi @ Kat Applewhite,

    If you do not have a license, you may receive this NDR:

    User's image

    I recommend that you contact support to request an exception for a low-reputation IP address:


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