MAY 7, 2022 Hi: I'm using the 'BEST in the WORLD Mail-Program - THUNDERBIRD' for MANY YEARS together with my Email address with Frontier.com for ABOUT 20 Years - since their beginning of their Fiber OPTICS Technology! I was pretty happy with the FLAWLESS(!) Frontier.com Internet Service UNTIL they unfortunately hired the disorganized YAHOO-Server Service: this UNFRIENDLY YAHOO is once-in-a while interfering when I'm trying to LOGIN to my DEFAULT(!) THUNDERBIRD ...does NOT ALLOW me to LOGIN to THUNDERBIRD AT ALL ...ABSOLUTELY RIDICULOUS!!! I've OBTAINED HELPED several times in the past from Frontier.com Support but this is my MAIN REQUEST FROM MOZILLA FOR HELP: CAN ANYONE HELP ME TO FINALLY END THIS RIDICULOUS YAHOO-INTERFERENCE in my LOGIN TO MY THUNDERBIRD, PLEASE - AN EFFECTIVE HELP TO PUT THE END TO THIS BEHAVIOR OF THE YAHOO WILL BE GREATLY APPRECIATED ...?!? In advance - MANY thanks ...dh

MAY 7, 2022 Hi: I'm using the 'BEST in the WORLD Mail-Program - '''THUNDERBIRD'''' for MANY YEARS together with my '''Email address with Frontier.com''' for ABOUT 20 Years - since their beginning of their Fiber OPTICS Technology! I was pretty happy with the ''FLAWLESS(!)'' Frontier.com Internet Service UNTIL they unfortunately hired the disorganized YAHOO-Server Service: this UNFRIENDLY YAHOO is once-in-a while interfering when I'm trying to LOGIN to my DEFAULT(!) THUNDERBIRD ...does NOT ALLOW me to LOGIN to THUNDERBIRD AT ALL ...'''ABSOLUTELY RIDICULOUS'''!!! I've OBTAINED HELPED several times in the past from Frontier.com Support but this is my MAIN REQUEST FROM MOZILLA FOR HELP: CAN ANYONE HELP ME TO FINALLY END THIS RIDICULOUS YAHOO-INTERFERENCE in my LOGIN TO MY THUNDERBIRD, PLEASE - AN EFFECTIVE HELP TO PUT THE END TO THIS BEHAVIOR OF THE YAHOO WILL BE GREATLY APPRECIATED ...?!? In advance - MANY thanks ...dh

Chosen solution

Hi and - MANY THANKS to both - DAVID & MATT ...you're the greatest HELP! So to update ALL who is still willing to help me to get this absolutely avoidable dilemma I'm wrestling for the full 4 days: - I finally was able to locate a knowledgeable Support Tech at Frontier.com and he has managed to FIX about half of my issue between Thunderbird and Yahoo ---> the RECEIVING MAIL (Server) finally works (thanks God!) BUT - the SENDING Yahoo Server is still stubborn and does NOT like to work displaying the following Error message:

USING the following OUTGOING SERVER (SMTP) Settings: smtp.mail.yahoo.com Port: 465 Security and Authentication: - Connection security: SSL/TLS - Authentication: Normal password,

I've received the following error: Sending of the message failed. Failed due to unexpected error 80004005. No description is available. The message could not be sent using Outgoing server (SMTP) smtp.mail.yahoo.com for an unknown reason. Please verify that your Outgoing server (SMTP) settings are correct and try again.

The Frontier's Support gentleman spent with me about 1 hr trying to find out why we could NOT get also the SMTP-Server working - after that he has apologized and let me go with ONLY HALF of Thunderbird MAIL Program working BUT has strongly recommended me to contact THUNDERBIRD people for help because he has tried both SERVERS (available to him) and none did work - he further pointed out that some Thunderbird experts might know about any glitches/issues which exists between Thunderbird Mail Program and Yahoo SERVERS which unfortunately he is NOT knowledgeable and/or did NOT have available the needed resources within his Support Group department.

In view of the above I'd greatly appreciate anyone who may have an idea how to make this Outgoing server (SMTP) smtp.mail.yahoo.com working - as would certainly greatly appreciate most of the public users who are forced to use a Yahoo Server with Thunderbird. Thanks ...Tony H.