Having problems with my Yahoo account. The Yahoo calendar disappeared. Suggestion was to delete and re-setup the account. Now I cannot get the account to set up. Keep getting to the point where Yahoo window opens and I add my email address and password and get the “Uh Oh” error message to try later and after that the OAuth error message. Nothing works. I have the right password.
Any ideas on how to get the OAuth to work?
Hey @SRJ try the below steps
Make sure the correct IMAP and SMTP settings for Yahoo are in place.
imap.mail.yahoo.com993smtp.mail.yahoo.com465 (SSL/TLS) or 587 (STARTTLS).What to do:
imap.mail.yahoo.com, and the Port is set to 993.smtp.mail.yahoo.com, and the Port is set to 465 (SSL/TLS) or 587 (STARTTLS).If you do not have two-step verification (2FA) enabled for your Yahoo account, you might need to allow “less secure apps” to connect, as eM Client is considered one.
Steps to allow less secure apps:
If two-step verification (2FA) is enabled, you’ll need to use an App Password to log into eM Client instead of your regular Yahoo password.
Steps to generate an App Password:
Thanks for the reply, but my problem does not let me get as far as those settings.
I choose Add Account. I enter my email address which is a Yahoo (Turbify) business email account. I choose no encryption, and click finish. The Yahoo window opens and I enter my email address and password and get a Yahoo error page that says “Uh oh, there’s been a problem, try again later” meanwhile on eM Client the message is wait, this could take a while. When I close there is an eM Client message that OAuth has failed.
When I contact Yahoo/Turbify they say browser issue and use an app password. eM Client says that if you are using OAuth that you use regular password. Neither works and it is impossible to even set up the new account. And both sides say to contact the other one.
I am quickly regretting the decision to use eM Client.
Hey there @SRJ Just a quick note in hopes it will help. You can’t use your actual password (as if you are directly logging into Yahoo.com). eM Client (and as I recall Outlook) uses an alternate version you create within your Yahoo.com account, called a secure mail key which you have to create (and then save/maintain/squirrel away for things like this happening).
I got the same message two months ago until I stumbled on this answer after waiting a few days for the problem to clear up (I originally thought the server was down). Because I’d been using eM Client (and a separate Outlook account) that was configured years ago, I had no problem without the calendar until “poof” the problem a lot of us are now facing appeared.
@Proteus Is the secure mail key the same as Yahoo app password? I created one of those and tried using that to log in for the OAuth sign in and Yahoo says bad password. I was on the phone with Yahoo today and they said to use the app password and beyond that, it was eM Client that would have to answer.
@SRJ, I don’t think it is because you’re logging into Yahoo itself.
The “protection” is meant for alternate email programs/browsers. I believe the reason is security compromises of databases outside the control of Yahoo (and others).
It’s my impression, eM Client and other downloadable apps won’t have your actual password, therefore, if an “offsite” database (say eM Client) is compromised you won’t lose access directly with Yahoo.com/their app. So I think… 
Minor progress. Using the manual email account set up option for Other - using the app password and fixing the port and SLS options, I appear to have the email account loading back into eM Client. The calendar may be a lost cause, but if I can just have my email back, that’s a big plus for me. Next I will try to manually add the calendar but Gary told me that would not work.
The Yahoo window opens and I enter my email address and password and get a Yahoo error page that says “Uh oh, there’s been a problem, try again later.
Try completely clearing the cache in your browser (All time) or failing that try setting a different browser as the default & see if that works.
Is the secure mail key the same as Yahoo app password?.
From Googling that question I believe they are separate things.l as @Proteus advised.
Also in my view “you shouldn’t need an app password at all with eM Client” with the Yahoo account as the mail, contacts, calendar etc are all added into eM Client using the OAuth token (like it does in my Outlook Yahoo setup) example when you click allow, and the generated app passwords are normally “only for less secure apps”.
Fom adding my Yahoo account into eM Client V10 “via the automatic account wizard” around 50 times to test, “one time after I completed the setup” for a split second I saw the Contacts and Calendar appear and the online data was there in each section of eM Client, but then they both dissapeared in front of my eyes while watching them and never reappeared.
Now it’s not the OAuth token part issue as that allways adds into the Yahoo online end, but seems to be the part (after that) which adds in the Yahoo Contacts and Calendar to eM Client.
Glad to see you at least got your email downloading. Regarding Gary’s comment, I would agree, I believe I tried that and failed. Because I have another PC that works fine, I’m going to hold out and see if after a couple of days it resolves itself magically.
@Gary @cyberzork On another note, I did do the .xml restore as I described somewhere on here (importing the previously saved settings that I backed up once I fixed my issue).
As expected, I was able to restore the Accounts | General | Services section with adding back CardDAV and CalDAV (and it appears within the row again) but sadly even though they are back, it doesn’t “see” the calendar.
A few months ago, I think this is the point where I decided to removed everything completely, clean the PC of any eM Client, comb the registry and start over. Maybe entirely coincidental that all that worked but it lasted for a few months. However, that was literally days of dogged tenacity and I just don’t want to go through that hassle now.
Yes I can also allways get eM Client Yahoo account to show the CardDAV and CalDAV everytime after running the wizard on brand new Win & Mac user profiles ,but the contacts and calendar “just never show in the actual Calendar and Contacts sections” apart from the one time where they dissapeared after a few seconds 
.
Creating new databases and uninstalling and reinstall eM Client on Mac and PC etc makes no difference. Seems to be a bug in eM Client.
For now untill this is fixed, Im just using the Outlook Yahoo Calendar and Contacts.
I hear you. When I read above that you had success those scant moments and imagined your brain screamed, “Finally! Success!!” with the proverbial, ‘Twenty seconds on the clock, 4th down and 1 yard to go’ as it faded instantly into the abyss, I too felt your pain. 
I have Yahoo Business email account and I do not have secure mail key, only option is the application password. I can’t use the automatic account wizard, that fails with a Yahoo error page that has no detail and Yahoo can’t explain, it won’t accept the OAuth.
I tried making Edge the default browser, cleared the cache and got the same error message.
Something changed as I had set up two similar Yahoo Business Mail accouts and they both worked fine. Then then the calendar disappeared and it has been all down hill since then.
For the moment, the email is still loading and looks like it will be functional. Based on the way I had to load the email, I think the calendar is a lost cause.
