[mrlyc]

Some years ago, Gmail changed so using Eudora with it became difficult. I've worked out the following procedure:

after checking email fails the second time,

Server SSL Certificate Rejected pops up

click on Yes

click on Tools then Options then Checking mail

click on Last SSL Info

click on Certificate Information Manager

under Server Certificates, keep expanding until you reach the bottom one

click on it then click on Add to trusted

click on File then Check Mail