Hundreds of email notifications all at once received stating "We couldn't send your message" . Why?

[papermoon.lady]

Hundreds? That does not sound right. Have you tried to send hundreds of messages?

What do the emails say? Is a reason listed?

[minimax_au]

Sounds like they are phishing emails so reporting them, thanks.

[padi*0409]

Any help from this thread ?

https://community.ebay.com.au/t5/Selling/sending-a-message-to-buyer/m-p/2436930#M216603