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

I create an office365 web mail account in thunderbird and all the mail is receiving and sending but in slow

  • 3 replies
  • 1 has this problem
  • 13 views
  • Last reply by Matt

more options

Hi, I create an office 365 web mail account in thunderbird. below is the setting,

IMAP setting Server name: outlook.office365.com port :993 Encryption method: SSL SMTP setting Server name: smtp.office365.com port:587 Encryption method: STARTTLS though it should be TLS

But the incoming mail is very slow. ? what be the reason. Appreciate for the quick response.

with regards Anil Gurung

Hi, I create an office 365 web mail account in thunderbird. below is the setting, IMAP setting Server name: outlook.office365.com port :993 Encryption method: SSL SMTP setting Server name: smtp.office365.com port:587 Encryption method: STARTTLS though it should be TLS But the incoming mail is very slow. ? what be the reason. Appreciate for the quick response. with regards Anil Gurung

All Replies (3)

more options

What does "slow" mean?

Have you tried it without anti virus scanning of incoming mail?

more options

Hi Matt,

Slow means it takes time to download the mails and yes i have scan the mail without using the antivirus.

more options

To diagnose problems with Thunderbird, try one of the following:

  • Restart Thunderbird with add-ons disabled (Thunderbird Safe Mode). On the Help menu, click on "Restart with Add-ons Disabled". If Thunderbird works like normal, there is an Add-on or Theme interfering with normal operations. You will need to re-enable add-ons one at a time until you locate the offender.
  • Restart the operating system in safe mode with Networking. This loads only the very basics needed to start your computer while enabling an Internet connection. Click on your operating system for instructions on how to start in safe mode: Windows 8, Windows 7, Windows Vista, Windows XP, OSX
If safe mode for the operating system fixes the issue, there's other software in your computer that's causing problems. Possibilities include but not limited to: AV scanning, virus/malware, background downloads such as program updates.