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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(112.00000000000001, 76%, 20%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESS%3C/text%3E%3C/svg%3E)
External sender receiving rejection email when sending email with photos to one of our internal recipient.
tried sending a regular mail to the internal address and successful.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(41.6, 80%, 14%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAL%3C/text%3E%3C/svg%3E)
Hi @Saurabh Singh ,
Whether the NDR provides additional useful information? Please provide a full NDR for better help!
(Please be careful to hide your personal information . Thank you!)
To narrow down the problem, follow the steps below to test to see if will receive the same NDR:
Hi @Saurabh Singh ,
I am writing to check if you have tried the suggestions I mentioned before.
Would you please get back to me at your earliest convenience? Because your response is of great importance for the following trouble shooting. If you need further help, please provide more detailed information, so that we can give more appropriate suggestions.
I look forward to hearing from you.
Hello,
In message tracking you should be able to get more details why the message was rejected.
Maybe a mail flow rule configured to reject a specific file extension?
Hi Rafael,
Upon last checks we can't find emails from sender email hitting our tenant in message trace.