This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Microsoft TLS change

  • 2 replies
  • 1 has this problem
  • 23 views
  • Last reply by rheraux

rheraux
rheraux
more options

I have been notified by Microsoft of the following change and I would like to know how it will impact my ability to receive/send mail via my Thunderbird "@msn" account whose IMAP mail server is "outlook.office365.com"

Starting on December 01, 2022, Office 365 will begin retiring Transport Layer Security (TLS) 1.0 and 1.1 for POP3 and IMAP4. Our records show that your email account has recently been accessed with POP3/IMAP4 through TLS 1.0 or 1.1. POP3 and IMAP4 will not be able to connect with TLS 1.0 and 1.1 starting on December 01, 2022. You will not be able to receive emails with POP3/IMAP4 protocol after that. To continue accessing your email account using POP3 or IMAP4, please upgrade/update your client to support TLS 1.2. Your emails will not be removed, but you cannot access them without upgrading your client.

Thank you for any assistance.

I have been notified by Microsoft of the following change and I would like to know how it will impact my ability to receive/send mail via my Thunderbird "@msn" account whose IMAP mail server is "outlook.office365.com" Starting on December 01, 2022, Office 365 will begin retiring Transport Layer Security (TLS) 1.0 and 1.1 for POP3 and IMAP4. Our records show that your email account has recently been accessed with POP3/IMAP4 through TLS 1.0 or 1.1. POP3 and IMAP4 will not be able to connect with TLS 1.0 and 1.1 starting on December 01, 2022. You will not be able to receive emails with POP3/IMAP4 protocol after that. To continue accessing your email account using POP3 or IMAP4, please upgrade/update your client to support TLS 1.2. Your emails will not be removed, but you cannot access them without upgrading your client. Thank you for any assistance.

Chosen solution

Thunderbird has supported TLS 1.2 for well over a year and your continued access to your account is safe.

Read this answer in context 👍 0

All Replies (2)

david
david
  • Top 10 Contributor
more options

Chosen Solution

Thunderbird has supported TLS 1.2 for well over a year and your continued access to your account is safe.

rheraux
rheraux Question owner
more options

Thanks for the quick reply.