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Message could not be sent. Error message from e-mail transport server: 451 - 451 4.3.5

5396632 shared this problem 7 months ago
Solved

I cannot send any message no matter the receipient since a few minutes ago.

It doesen matter if I use the Web interface or Thunderbird.

I get the following error message:

Message could not be sent. Error message from e-mail transport server: 451 - 451 4.3.5 Server configuration error

Please help!

Replies (6)

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On my side, my account balance is positiv and I reinstall profils. Still not working neither on my computer (apple mail) nor my phone.


Reception working fine.

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1

Same here. My account balance covers the service until Feb 2023, the error message returning is

"RCPT TO <gvoelker@mit.edu> failed: Server configuration error"


I am working on Archlinux with Evolution Mail 3.42.3

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2

Working again, Thanks for the reactivity ! Great service !


Good day to you

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Confirmed here also, fixed!

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Confimred here aswell. Fixed. Tnx!

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I think I have a problem similar to this one in the topic: I am a light mailbox customer since yesterday and I still can't send an email, it always gives me an error

Wrong or missing login data to access e-mail transport server smtp.mailbox.org. Please check associated account's settings/credentials -.

Date: 12/9/2022 23:09, Host: office.mailbox.org, UI Version: 7.10.6, Server Version: 7.10.6-Rev24, Browser: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.0 Safari/537.36 Edg/105.0.1343.27

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same problem here for wakeupcall@mailbox.org - please check

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