It's possible the link you were using was retired. Starting from the website's main page, work your way to where you want to be. Then replace the bookmark.

Thanks FredMcD but this doesn't solve it. The link works with Safari, for example.

What is the url in your bookmark?

Which one are you using for email? see screenshot

I use LionMail

Okay, but what is the url in your bookmark. This is what I see for that login page.

https://cas.columbia.edu/cas/login?SAMLRequest=fVLLTuMwFN0j8Q%2BW93mVWTBWk6qAEJV4RDSwYOc4N4krPzq%2Bdjv8PW4KgllMt8fnnsf1nS%2F%2BakV24FBaU9IizSkBI2wnzVDSl%2BY2uaSL6vxsjlyrLVsGP5pn%2BBMAPYmTBtn0UNLgDLMcJTLDNSDzgq2XD%2FdsluZs66y3wipKVjclFbAZh7ZtpTDjRmjdKqO6gXej1aJTfdtvNlJIrSl5%2FYo1O8RaIQZYGfTc%2BAjlsyIpimSWN8Ulu%2FjNfuVvlNSfTlfSHBucitUeScjumqZO6qd1MwnsZAfuMbJLOlg7KEiF1Qf7miPKXYR7rhAoWSKC8zHgtTUYNLg1uJ0U8PJ8X9LR%2By2yLNvv9%2Bm3TMazmC7oVvIUupBxgbSadsumeu7HUk%2BH51%2FmtPqWn2c%2FpKrPPztUWd3UVknxTpZK2f21A%2B5jD%2B9CrHFrneb%2B%2F25FWkyI7JJ%2BorJgcAtC9hI6SrLq6PrvccST%2BQA%3D&RelayState=https%3A%2F%2Fwww.google.com%2Fa%2Fcolumbia.edu%2FServiceLogin%3Fservice%3Dmail%26passive%3Dtrue%26rm%3Dfalse%26continue%3Dhttps%253A%252F%252Fmail.google.com%252Fmail%252F%26ss%3D1%26ltmpl%3Ddefault%26ltmplcache%3D2%26emr%3D1%26osid%3D1

I would keep it simple and use this https://cuit.columbia.edu/email as the bookmark url and then click on Lion email.

thanks so much; this is what I see that works on Safari but not on Firefox

https://cuit.columbia.edu/email/lionmail

I have several versions of Firefox and had no problem.

Delete browsing, search and download history on Firefox {web link}

Remove a single website from your history {web link}

Open the History Manager <Control> (Mac=<Command>) <Shift> H. In the search bar, enter the name of the site. Right-click on one of the listings and select Forget About This Site. This should remove all information, including any site settings And Passwords.

thanks so much; this is what I see that works on Safari but not on Firefox https://cuit.columbia.edu/email/lionmail

Yes, that link gets you 1 click away from login. So no browser issue, just link issue. Let's mark this issue resolved and you get back to your books.  ;-))

thanks so much!