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After Lightning was updated, Thunderbird was slowed to a snail's pace; how can it be speeded up?

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  • Last reply by sfhowes

mt88
mt88
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About a week ago my Lightning app was updated to 5.4.0.1 ; immediately Thunderbird slowed to a crawl. It creeps while connecting to the Outlook server; after connecting, it takes a painfully long time to open the Inbox. Every step is very slow, and very frequently stops, showing a message stating: "Connection To Outlook Server Timed Out."

My OS is Windows 10 Home version 1607; my computer is HP Pavilion dm4 with Intel Core i5, 2.50 GHz, 64 bit operating system, x64 bit processor, etc.

I have read a number of similar complaints, questions and answers on this site. None of those comments have offered a procedure that works, other than those that suggest disabling Lightning. This works! But then, I have no Lightning Calendar!

I have also verified my servers imap and smtp connection parameters, etc.

Is there a solution for regaining the speed of Thunderbird, while enabling Lightning Calendar?

About a week ago my Lightning app was updated to 5.4.0.1 ; immediately Thunderbird slowed to a crawl. It creeps while connecting to the Outlook server; after connecting, it takes a painfully long time to open the Inbox. Every step is very slow, and very frequently stops, showing a message stating: "Connection To Outlook Server Timed Out." My OS is Windows 10 Home version 1607; my computer is HP Pavilion dm4 with Intel Core i5, 2.50 GHz, 64 bit operating system, x64 bit processor, etc. I have read a number of similar complaints, questions and answers on this site. None of those comments have offered a procedure that works, other than those that suggest disabling Lightning. This works! But then, I have no Lightning Calendar! I have also verified my servers imap and smtp connection parameters, etc. Is there a solution for regaining the speed of Thunderbird, while enabling Lightning Calendar?

All Replies (1)

sfhowes
sfhowes
  • Top 10 Contributor
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What are your settings for the IMAP and SMTP servers?

https://support.mozilla.org/en-US/questions/1156972#answer-961439