Yonke imikhiqizo Community Forum

Failure to download email from Optus. I have spent a number oif hours to no avail talking and typing with the Optus staff regarding this problem. 1. I can send email from TB but cannot receive. 2. I can see the incoming emails in their Webmail site. 3. Optus confirm my settings are correct for both the mail server and SMTP server. When I go to Settings> Security > Passwords > remove server so I can re-submit my password, the only one showing is the SMTP server. Should the incoming mail server also be shown?

I am frustrated and ready to dump TB but have bee with it many years and don't want to start again with another programme as I am 83 and am partially blind. Please can anyone assist?

Having opened Thunderbird a message came up to the effect that the folder had not loaded. No emails were shown in the list, although the total number of emails in the folder appeared as usual above the list.

Thunderbird then downloaded over 100 emails, according to the status bar. These messages were previously present on the server, and were downloaded via POP3 with the option to delete on the server once downloaded selected.

Having closed Thunderbird and relaunched, the folder with all the existing emails appeared. However, there are no emails now on the server, this having been verified by logging in to webmail.

Where have the emails gone?

If they are indeed lost then why does Thunderbird proceed with downloading messages when a folder has not loaded? Why is downloading of messages not conditional on the folder having loaded? This would avoid such an eventuality.

I am running Thunderbird 115.18.0 32-bit in Windows 7 SP1 64-bit.

Hi all,

I’m having trouble with Thunderbird where emails I send don’t show up in the Sent folder. I use a Gmail account via IMAP.

Details: •⁠ ⁠When I send an email, it doesn’t appear in the Sent folder in Thunderbird - sometimes it does thou. •⁠ ⁠Sometimes sent emails don’t appear even in Gmail’s web Sent folder. •⁠ ⁠I have checked my account settings, and the Sent folder is mapped correctly. •⁠ ⁠I use Thunderbird version: Version 140.0esr on Sequoia 15.5. •⁠ ⁠I don’t see an Outbox folder in Thunderbird. •⁠ ⁠Sometimes I get errors related to folder sync (like “folder in use” message).

What I tried: •⁠ ⁠Restarted Thunderbird •⁠ ⁠Checked folder subscriptions and synchronization •⁠ ⁠Verified Gmail IMAP settings •⁠ ⁠Sent test emails to other accounts — same issue persists

I’d appreciate any tips on how to ensure sent emails are saved and visible in Thunderbird’s Sent folder and on Gmail!

thanks

On one of my email accounts when I start a new email message the page fills with this - -- PK?????!?A�.f?T????[Content_Types].xml �??(�?���n�0?E���?�� �tQUUH?},�HM?��?��/����;@��(?�I6H0s�=?xF��V� |���d� H?�[!M����[�H�?�?LY?9�B ����h�u??T���E����?�YȬ?���z�"���:�X �~0x�ܚ?&��� ��??l�b��� ɷ��$�Mc��?�+��@�j<�p�a�)�Y�:]?q@��2T�=a!]�Æ����?��}���R@2e>�3�]tm����Fev��?�- ɡ�Wn�[?!�w�*k+�I����?q� \���폇?Qp ��s/�?�W��c�?R`��?\?��xj��?��mNEb��[?p?���?��:Ł?�(O�um"Z�=?T�@�8�M�8�?��?PK?????!?�?��N????_rels/.rels �??(�?���j�0?@���ѽQ��?�N/c��?�??[IL?��j���<��?]�aG��ӓ�zs�Fu��]�?�U �� ��^�[��x����1x�p�?���f��#I)ʃ�Y?��??������?�*D��?i")��c$���qU���~3��1��jH[{?�=E��?��?~

I checked the installed Programs on My Windows 8.1 laptop, and saw that two x86 versions of Thunderbird are installed - 115.10 on 05/07/2024 and 115.118.0 on 30/06/2025

Should I remove version 115.10?

Could two installed versions be causing the following to happen?

I have set incoming server settings correctly for each email account - outlook.office365.com SSL/TLS, OAuth2 and the outgoing server settings are correct - smtp.office365.com Port 587, STARTTLS, OAuth2

Microsoft is repeatedly requiring me to enter passwords for email accounts.

This message often displays: Login to server SMTP.Office365.com with username x failed.

When I click 'Send' I often receive: Sending of the message failed. Unable to authenticate to outgoing server SMTP-mail.outlook.com

and

Authentication failure when connecting to server Outlook.Office365.com

Advice on anything else I should check / change will be greatly appreciated. Thank you!

I have an Optus email and use Thunderbird, for a week now I can only send but not receive emails with my Optus net email in Thunderbird, phoned Optus up say the problem is not theirs,got an it expert in spent 2hours on it at a cost of @$250 said to me ,everything is fine it seems Optus is blocking the Optus email from coming in,note I can send and receive emails with my iPhone with Optus email but not in Thunderbird. I am pulling my hair out is there a solution to this? Spent 20 hours plus trying to solve it ket alone paying an it technician plus on the phone to Optus and NO SOLUTION!!

I am unable to send an original email right now with Thunderbird. I realize "original" is not the best descriptor but what I am trying to describe is if I compose an email to another party, Thunderbird tries to send it and immediately returns the message below even if I send the word Test in the subject line and as the one word text message:

Send Message Error Sending of the Message failed An error occurred while sending email. the mail server respnded: [VO-1] Message blocked due to spam content in the message. Please check the messge and try again.

I have tried multiple email recipients with the same results.

However, if I take an email currently in my Inbox and Forward it to another recipient, it sends it with no error.

Thanks for your help. I am sure I have done something I should not have but I cannot think of what it was.

Mike Black

Good afternoon, dear friends. Thanks for the awesome program for the android version, I use it on my computer too. Can you tell me how to set the frequency of checking emails more often than the 15-minute interval? In other android mail clients, emails arrive almost immediately, within 5-10 seconds, but here the verification interval is very long, and manual verification is such a thing. How do I set it up?

bonsoir, depuis quelques mois je ne peux plus envoyer de mails avec thunderbird, orange m'assure que le serveur SMTP est fontionnel. merci de votre aide. Marie Bordet

I was emailing a colleague. It was working fine and now I am getting a message that it prevented because it is deemed phishing.

It is a good email address and welcome correspondence. How do I regain the ability to send him emails.

I am receiving emails but can't forward on an email or send a new email. The message that comes up on screen says "sender rejected. Please verify that your email address is correct in your account settings and try again". My email address is mryankillavalla@eircom.net

When I try to send an email I receive this error message:

"Sending of the message failed. An error occurred while sending mail. The mail server <tlkramer52@sio.midco.net> sender rejected. AUP#BL. Please verify that your email address is correct in your account settings and try again".

I have verified that the address is correct. How can I fix this problem?

T. Kramer

Suddenly, after months of no trouble, Emails are not being received. All settings are OK and have not changed. There should be no reason therefore for Emails to stop appearing. None at all have been received today, 04.06.25

Can emails written be delayed in sending - this may be important in writing to different world time zones preventing email to be received by recipients at night times or hoidays.