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

Echekwara usoro a. Biko jụọ ajụjụ ọhụrụ ma ọ bụrụ na ị chọrọ enyemaka.

Unable to login to mail server

  • 1 nzaghachinzaghachi
  • 1 nwere nsogbu anwere nsogbu a
  • 55 views
  • Nzaghachi ikpeazụ nke david

jam3s.cky
jam3s.cky
more options

I am using Thunderbird for my O365 Outlook, until recently gotten this msg "Login to server outlook.office365.com with username ###@###.### failed." but I can login online perfectly fine.

Here are my Server Settings Server Type: IMAP Mail Server Server Name: outlook.office365.com Port: 993 Connection security SSL/TLS Authentication method: Normal password

Outgoing Server (SMTP) Settings Server Name: smtp.office.365.com Port: 587 Authentication method: Normal password Connection security STARTTLS

Pics attached for better understanding.

I am using Thunderbird for my O365 Outlook, until recently gotten this msg "Login to server outlook.office365.com with username ###@###.### failed." but I can login online perfectly fine. Here are my Server Settings Server Type: IMAP Mail Server Server Name: outlook.office365.com Port: 993 Connection security SSL/TLS Authentication method: Normal password Outgoing Server (SMTP) Settings Server Name: smtp.office.365.com Port: 587 Authentication method: Normal password Connection security STARTTLS Pics attached for better understanding.
Nseta ihuenyo ndị agbakwunyere

All Replies (1)

david
david
  • Top 10 Contributor
more options

I believe office365 now requires an APP password (one that is unique for email clients, not the same one used for web access. There should be more information at your email host for this. A web search for office365 and APP password will show a number of sites with info.