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NaIchHalt09
2 years ago

It’s in the error message.

NaIchHalt09
2 years ago
Reply to  fenefene

Contact the recipient in a different way and inform about the error.

NaIchHalt09
2 years ago

All recipients are with different providers? Then it’s up to you. Faulty configuration of your mail server, spam, strange file attachments?