The major cause is the NOTORIOUS ISSUE caused by pop.mail.yahoo.com described previously as follows: '...the Sign-in attempt prevented email when you try to connect your… (read more)
The major cause is the NOTORIOUS ISSUE caused by pop.mail.yahoo.com described previously as follows: '...the Sign-in attempt prevented email when you try to connect your Yahoo Mail with THUNDERBIRD, Yahoo has BLOCKED Thunderbird from connecting because it's a "less secure" non-Yahoo app...!!! PLEASE (!) - CAN WE FINALLY FIX PERMANENTLY THIS NIGHTMARE and a NON-SENSE caused by YAHOO's 'racist attitude' so that THUNDERBIRD is NOT BLOCKED by this pop.mail.yahoo.com issue, please ?!? What is needed to PREVENT the pop.mail.yahoo.com SERVER BLOCKING the ACCESS to THUNDERBIRD and allowing the use of THUNDERBIRD EMAIL FUNCTION IN SENDING & RECEIVING Email: this is 'SOMETIMES' possible very quickly & easy to eliminate by SELECTING an Option displayed ONLY SOMETIMES (!) by YAHOO which 'ALLOWS Yahoo SERVER to be connected by "less secure" non-Yahoo applications like THUNDERBIRD' !!! Does anyone KNOW how to PERMANENTLY ELIMINATE this YAHOO-restriction - probably best from inside (within) the THUNDERBIRD (!) ...?!? In advance - MANY THANKS to ANYONE who could advise HOW TO HAVE THIS ISSUE FINALLY resolved !!! Tony H.