Att yahoo continuously logs out as soon as I open email

Subject says it all. Ever since ATT merged with Yahoo email, it has been horrible. Yahoo is horrible since the beginning of this year. ALWAYS have to log in no matter if my Keychain has my password. How technology has gotten so bad since 2003 I'll probably never know. One reason, from an older IT worker I know, is younger, sloppy code writers.

Yahoo nor ATT can handle email anymore. I am quitting both.