Email invoices fail to deliver - 'Diagnostic-Code: rejected'

Question

Email invoices - "Diagnostic-Code: rejected"

I'm working with a business that is unable to receive MYOB invoices/statements from their supplier.

Looking at previous forum posts (1) (2), it seems these people were able to remove the address from a blacklist and/or add it to a whitelist.

Can I request a DM to provide customer details/email address to investigate?

Email from MYOB below

From: [removed] <bounce@apps.myob.com>
Sent: 22/5/2025 4:17 pm
To: [removed]
Subject: Undeliverable: Invoice [removed] From [removed]

Sorry, email delivery was unsuccessful.

Subject: Statement From [removed]

Destination: [removed]

Sent: May 22nd 2025 4:08:26pm

Message: [removed]

Diagnostic-Code: rejected

tim-kat · Answer

I will also add that MYOB's domains and IP have been whitelisted on the recipient's MS 365 tenant, this appears to be blacklisting at MYOB's end.

doreen_p · Answer

Hey tim-kat,
&nbsp;
It's possible the recipient's email address has been blacklisted on our end, which might be why things aren't going through. Best thing to do is let our team check it from our side— they'll be able to confirm what's going on and help clear it up. You can reach them on Live Chat via our virtual assistant, MOCA.
&nbsp;
Cheers,
Doreen

antz72 · Answer

One customers email is being rejected. How do I get an email removed from Blacklist in MYOB please? Anthony

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Email invoices fail to deliver - 'Diagnostic-Code: rejected'

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