We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

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.

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

Èròjà atẹ̀lélànà yii ni a ti fi pamọ́ fọ́jọ́ pípẹ́. Jọ̀wọ́ béèrè ìbéèrè titun bí o bá nílò ìrànwọ́.

I am unable to receive or send external emails from a number of ISP's.

  • 2 àwọn èsì
  • 1 ní ìṣòro yìí
  • 1 view
  • Èsì tí ó kẹ́hìn lọ́wọ́ Wayne Mery

more options

I am unable to receive or send external emails from a number of ISP's. Appears to have been since an upgrade to 78.5.0. Others I know have the same problem. Message says connected to server, but no new emails are coming in, I can't move emails to other folders, and sending emails results in sent copies not going to the sent folder, but instead a message offering saving the Local Folders is presented. It isn't a server problem because I can use Outlook as normal - but I detest Outlook, and would prefer that Thunderbird worked!

I am unable to receive or send external emails from a number of ISP's. Appears to have been since an upgrade to 78.5.0. Others I know have the same problem. Message says connected to server, but no new emails are coming in, I can't move emails to other folders, and sending emails results in sent copies not going to the sent folder, but instead a message offering saving the Local Folders is presented. It isn't a server problem because I can use Outlook as normal - but I detest Outlook, and would prefer that Thunderbird worked!

Ọ̀nà àbáyọ tí a yàn

If you are using ESET/NOD32 security/AV then probability is very high it is causing your problems. According to ESET forums, you should temporarily disable SSL on ESET until they solve the problem per https://support.eset.com/en/kb3126-disable-ssl-filtering-in-eset-windows-products?ref=esf - the problem is being reported by dozens of users https://forum.eset.com/topic/26517-problems-with-thunderbird-and-imaps/ https://forum.eset.com/discover/

You might also inform them of your difficulty.

Ka ìdáhùn ni ìṣètò kíkà 👍 1

All Replies (2)

more options

Oh, and I have read and tried the answers about removing cookies with no success.

more options

Ọ̀nà àbáyọ Tí a Yàn

If you are using ESET/NOD32 security/AV then probability is very high it is causing your problems. According to ESET forums, you should temporarily disable SSL on ESET until they solve the problem per https://support.eset.com/en/kb3126-disable-ssl-filtering-in-eset-windows-products?ref=esf - the problem is being reported by dozens of users https://forum.eset.com/topic/26517-problems-with-thunderbird-and-imaps/ https://forum.eset.com/discover/

You might also inform them of your difficulty.