Yahoo emails not fully loading in desktop Mail app

All those settings are set automatically when you first install Yahoo mail on the Mac using your Yahoo email address and PW. Cannot even check these as they do not show up in the preference panes anywhere so I assume they are set correctly. I have never had any issues until about two months ago using Monterey.

This has been reported by many (including myself). For me it started with Monterey. This is not just a Yahoo issue as others have noted. I have tried all fixes and none work. What I do is to go to the Yahoo site and read the full email there and/or you can forward the mail back to you and it will show full content. I would also report this issue to Apple:

Feedback - macOS - Apple

Below is a Copy and Paste from Yahoo itself

Reference to link below

https://ca.help.yahoo.com/kb/SLN4075.html

IMAP server settings for Yahoo Mail

IMAP is the state of the art technology to connect your Yahoo Mail account to a desktop mail client or mobile app.

It allows 2-way syncing, which means everything you do remotely is reflected in your Yahoo Mail account no matter where or how you access it. Here are the settings you'll need to configure your mail client or app.

Incoming Mail (IMAP) Server

• Server - imap.mail.yahoo.com
• Port - 993
• Requires SSL - Yes

Outgoing Mail (SMTP) Server

• Server - smtp.mail.yahoo.com
• Port - 465 or 587
• Requires SSL - Yes
• Requires authentication - Yes

Your login info

• Email address - Your full email address (name@domain.com)

https://ca.help.yahoo.com/kb/sln-sln28681.html

Download your email from Yahoo Mail with IMAP

Use the IMAP settings below to download your email from Yahoo Mail into a third-party email app, like Thunderbird, Outlook, or Mac Mail. For accounts with a lot of content, it can take several days or longer to download everything. If you need specific instructions to configure your app with our settings or to check the progress of your download, please reach out to the app developer.

We've updated our Terms of Service and Privacy Policy - You'll need to review and accept the new Terms of Service and Privacy Policy to allow third-party email apps to access your Yahoo Mail account. If you haven't already, sign into your account using a web browser to do so.

Then, use this info to configure your app

Incoming Mail (IMAP) Server

• Server - export.imap.mail.yahoo.com
• Port - 993
• Requires SSL - Yes

Outgoing Mail (SMTP) Server

• Server - smtp.mail.yahoo.com
• Port - 465 or 587
• Requires SSL - Yes
• Requires authentication - Yes

Your login info

If you're using Yahoo Account Key or some older email apps, generate an app password and use that for your account password.

• Email address - Your full email address (name@domain.com)
• Password - Your account's password
• Requires authentication - Yes

• Password - Generate App Password
• Requires authentication - Yes

If you are looking to download your email from Yahoo Mail into a third-party email app like Thunderbird, Outlook, or Mac Mail one time, see SLN28681 or if you need specific instructions for your mail client or app, reach out to its manufacturer.

Hello,

Can you be more specific about what is not loading when you use the Mail App.

Do you happen to see a button at the top of them that says "Load Remote Content?" Do the emails appear normal when viewing them in their own window rather than in the Mail side by side view?

You should report this to Apple directly. They usually do not read these here.

Feedback - macOS - Apple

One workaround is to move the emails to another folder and then move them back.

There was a recent discussion here in the last day or two on this topic and another suggestion involved turning some feature off. Perhaps you can find it.

Mail > Settings / Preferences > Accounts ?

No. It only shows your email address after using the Yahoo app to set up the account initially. All the rest is in the background and hidden.