Do you mean that only the hotmail accounts are slow, but the yahoo and gmail accounts are OK? The MS accounts have been a problem for the last few weeks, and it is happening with other email programs besides TB.

Here are some more discussions that describe the situation:

Mozillazine

Downdetector

Thank you for the reply. Yes You are right, it is just the MS accounts. I read the links you sent me. Thank you for your help :)

A recent post on the Mozillazine forum suggests that changing the incoming IMAP server to outlook.office365.com results in much improved performance, and so far I can confirm this is true.

I will try the suggested changes to the "outlook.office365.com" and let you know. The following link I found very helpful for testing my mail server as well as other "DNS" tools. http://www.dnsstuff.com/tools

I tried changing the server to outlook.office365.com for one of my MS accounts and not the other for comparison. It has made a diffrence so far (it has only been two hours). Thank you :)

To: no-reply@support.mozilla.org

IMAP Server name: imap-mail.outlook.com Port: 993 Connection security: SSL/TLS Authentication Method: Normal password

SMTP Server name: smtp-mail.outlook.com Port: 587 Connection security: SSL/TLS Authentication Method: Normal password

sfhowes Thank you for your response. I'm unfamiliar with the proper procedures for posting an answer to your question for further info. I hope you get these details of my Outlook IMAP and SMTP settings.

IMAP settings: Server name: imap-mail.outlook.com Port: 993 Connection security: SSL/TLS Authentication Method: Normal password

SMTP settings: Server name: smtp-mail.outlook.com Port: 587 Connection security: SSL/TLS Authentication Method: Normal password

mt88 said

sfhowes Thank you for your response. I'm unfamiliar with the proper procedures for posting an answer to your question for further info. I hope you get these details of my Outlook IMAP and SMTP settings.

Whenever possible, follow up with a reply to the original post.

Change the incoming server to outlook.office365.com and the outgoing server to smtp.office365.com and change the connection security to STARTTLS for the outgoing server. User name in both cases = full email address. Restart TB, and enter your password when prompted the first time you receive or send mail on the outlook.com account.

to sfhowes Thank you for the suggested changes to the server settings, which I implemented exactly. Next, after shutting down my TB program and restarting it, I sent a couple of test messages to myself. The result was immediate success in sending the messages, but the messages were not received. A pop-up message stated “Failed to connect to server Outlook” whenever I clicked on “Get messages” in the “Mail Toolbar.”

On the other hand, the messages were promptly received by the Outlook Mail program. Another test message was immediately sent from and received by Mail with no problem, but not received by TB.

Office365 is not installed on my computer. Does that matter?

If TB is not connecting to the incoming server, check that there is no incorrect password for the outlook.com imap server in Tools/Options/Security/Passwords/Saved Passwords. Delete the existing password for the account, OK, restart TB and enter the correct password when prompted.

It's not necessary to have Office365 installed.

To: sfhowes Thank you. I believe this final operation of correcting the password as you instructed resolved my problem. I ran several tests while Lightning was still disabled and one after enabling Lightning. All the test show that TB is now functioning normally (as it had up to a week ago). I appreciate and thank you for your guidance.

As I stated I did what you suggsted on one of my MS accounts and not the other. It is still working perfectly on the account I changed. I will now do it to the other one too. Thank you for your help :)

I did the above and it means I can now send emails but not receive them on the one account that was accepted. On one of the above suggestions you say use on incoming "outlook.office365.com" but do not say whether POP3 should remail as well?

woodtisbury said

I did the above and it means I can now send emails but not receive them on the one account that was accepted. On one of the above suggestions you say use on incoming "outlook.office365.com" but do not say whether POP-mail should remail as well?

Subsequently found it need removal.

I changed the pop as well. I did it on one account first to test it. When It worked i did it on all my accounts. It is a shame you had to remove it.

Firelass77 said

I changed the pop as well. I did it on one account first to test it. When It worked i did it on all my accounts. It is a shame you had to remove it.

Who removed POP access? The incoming server settings are the same as IMAP, i.e. outlook.office365.com and SSL/TLS, except the port is 995.