Yes, continued use of insecure settings will have resulted in TalkTalk withdrawing IMAP access to your mailbox as a last resort action to stop devices connecting insecurely.
Have you got the correct setup for the iPhone and Thunderbird? If you wish to have confirmation then take screenshots of the incoming server settings and outgoing SMTP server settings, image edit and upload here using the picture icon above this Reply area for the mobile browser or camera icon for the desktop browser. The devices will not authenticate a password until TalkTalk Support do restore full access.
Do you access the mailbox any other way? All mail collection services and other devices must use secure settings or risk triggering a withdrawal of IMAP/POP3 access.
Webmail using an up to date browser is secure by design and should still work to keep you in touch.
Select here: Sign in to TalkTalk Mail
Enter your full TalkTalk Mail email address and password, select Sign in. Let us know if you have any issues.
A request will go in to TalkTalk Support to restore access and that'll happen next week.
Prepare for TalkTalk Support - include in the Community Profile (not in these public posts):
Account holder name, TalkTalk home 'phone number (if not Data Only broadband)
Alternative mobile contact number. Full address with postcode (in the Location box)
Scroll down to Private notes to add the email address needing access and your customer account number
Check and Save changes
Select here: Update your profile
The TalkTalk Mail Support Hub is your go to resource for information, guides and Community support for TalkTalk Consumer home broadband and MailPlus subscribers.
Select here:
TalkTalk Mail Support
TalkTalk Mail help
Email settings and device setup guides for TalkTalk Mail
Setting up TalkTalk email on iPhone
