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thunderbird 115.18.0 can no longer send e-mails

  • 2 replies
  • 3 have this problem
  • 2 views
  • Last reply by f1sgo.ms77

Lucie.Habraken
Lucie.Habraken
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Hello, Since tuesday (2025 february 25) I can no longer send e-mails from my main account, whoever is the recipient. As soon as I clic on "Send" I get the message below: "Sending of the message failed. An error occurred while sending mail. The mail server responded: : Client host rejected: Access denied. Please check the message recipient <recipient address>". I did not change anything. I have the exact same issue on an other computer with the same Linux distribution (Xubuntu 20.04, both up to date) running the same Thunderbird version (115.18.0). What is weird is that I have no trouble to send e-mails from a secondary account, on both computers. I checked using openssl that the problem is NOT related to the smtp server. Anyone experienced the same weird issue? Thanks in advance for any help. Lucie

Hello, Since tuesday (2025 february 25) I can no longer send e-mails from my main account, whoever is the recipient. As soon as I clic on "Send" I get the message below: "Sending of the message failed. An error occurred while sending mail. The mail server responded: : Client host rejected: Access denied. Please check the message recipient <recipient address>". I did not change anything. I have the exact same issue on an other computer with the same Linux distribution (Xubuntu 20.04, both up to date) running the same Thunderbird version (115.18.0). What is weird is that I have no trouble to send e-mails from a secondary account, on both computers. I checked using openssl that the problem is NOT related to the smtp server. Anyone experienced the same weird issue? Thanks in advance for any help. Lucie

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Lucie.Habraken
Lucie.Habraken Question owner
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I just installed Thunderbird 128.7.1esr on a more recent Xubuntu distribution (24.04) and configured it from scratch but I still can't send any mail and get each time the same error message as above. Should I switch to another e-mail manager?

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f1sgo.ms77
f1sgo.ms77
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Hello à tous, depuis le 26.02.2025 j' ai le même probleme que Lucie, le même message d' erreur, j' ai perdu du temps à chercher la solution sans résultat, sans aide des programmeurs Thunderbird je serai obligé d' abandonner Thunderbird pour un logiciel plus stable. Bien Cordialement Yann. 

Hello everyone, since 02/26/2025 I have the same problem as Lucie, the same error message, I wasted time looking for the solution without result, without help from Thunderbird programmers I will be forced to abandon Thunderbird for a more stable software. Best regards Yann.

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