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

Cannot log in to site, cannot reset password, receiver error: Error Sending your new password: SMTP Error: Could not authenticate.

  • 2 svar
  • 2 har dette problemet
  • 1 view
  • Siste svar av CaregiverG

more options

Trying to log on to site I have used before and have an account. When I try to log in, the email and password are wiped out and I get the same login page with blank fields again. When I try to reset the password I get the following error message: Error Sending your new password: SMTP Error: Could not authenticate.

Trying to log on to site I have used before and have an account. When I try to log in, the email and password are wiped out and I get the same login page with blank fields again. When I try to reset the password I get the following error message: Error Sending your new password: SMTP Error: Could not authenticate.

All Replies (2)

more options

Regarding the login: When you have a problem with one particular site, a good "first thing to try" is clearing your Firefox cache and deleting your saved cookies for the site.

(1) Bypass Firefox's Cache

Use Ctrl+Shift+r to reload the page fresh from the server.

Alternately, you also can clear Firefox's cache completely using:

"3-bar" menu button (or Tools menu) > Options > Advanced

On the Network mini-tab > Cached Web Content : "Clear Now"

If you have a large hard drive, this might take a few minutes.

(2) Remove the site's cookies (save any pending work first). While viewing a page on the site, try either:

  • right-click and choose View Page Info > Security > "View Cookies"
  • (menu bar) Tools > Page Info > Security > "View Cookies"
  • click the padlock or globe icon in the address bar > More Information > "View Cookies"

In the dialog that opens, you can remove the site's cookies individually.

Then try reloading the page. Does that help?


I notice you have quite a few extensions and wonder whether you could rule out extensions as a potential source of the problem by testing in Firefox's Safe Mode? That's a standard diagnostic tool to deactivate extensions and some advanced features of Firefox. More info: Diagnose Firefox issues using Troubleshoot Mode.

If Firefox is not running: Hold down the Shift key when starting Firefox.

If Firefox is running: You can restart Firefox in Safe Mode using either:

  • "3-bar" menu button > "?" button > Restart with Add-ons Disabled
  • Help menu > Restart with Add-ons Disabled

and OK the restart.

Both scenarios: A small dialog should appear. Click "Start in Safe Mode" (not Refresh).

Any difference?


Regarding the password reset: it sounds like the site is broken. I don't see how a browser could cause that error.

more options

Tried both of those before posting the question. Didn't help. Thanks anyway.