One of our users is receiving an “authentication required” prompt (dialog box) when opening an email from a specific outside source. It asks for a user name and password to the senders server. Is this something on the senders end?
They can read the email.
Subject: authentication required when opening an email
Did you ever find an answer on what is causing this? I am having the same issue with one of my users.
Thanks,
Sean
Subject: RE: authentication required when opening an email
I am also having this issue with one of our users, any word?