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Problem signing to IMAP email accounts with MacOS 15.0 and 15.0.1 updates.....

Since updating to MacOS 15.0 and then 15.0.1, I'm unable to connect with my InMotion IMAP email accounts in either Mac Mail or Outlook 365. Everything worked fine prior to updated the OS. I've tried deleting then re-adding the accounts in both email browsers with no luck. Everything is set up correctly (User names, email addresses, passwords, Incoming and Outgoing servers, and Ports, using SSL to connect. I've also tried resetting the IMAP account passwords. No matter what I try I can't connect with the IMAP server on this computer with Sequoia 15..


In Mail, I get an "Unable to verify account name or password." message.


In Outlook, I get an "Unable to sign in. Check your credentials and try again." message.


I've contacted InMotion and everything is set up properly. I can access the accounts through IONCube.


Please help!


Thanks.

Mac Studio, macOS 15.0

Posted on Oct 7, 2024 9:20 AM

Reply
15 replies

Oct 15, 2024 8:51 AM in response to Paul Hadaway

Most likely biggest factor is using Other in Mail setup, then using a Browser that doesn’t have Yahoo PW stored init to get the App PW.

Changed Yahoo password, yahoo stopped sen… - Apple Community


Using app passwords with apps that don't support two-step verification (microsoft.com)

What about application passwords? Will that keep working?

If application passwords are being used for MFA (Multi Factor Authentication) along with basic auth as another auth mechanism, then when basic authentication is disabled, app passwords used for MFA will stop working too.

Where can I find more information?

There are several resources that we wanted to provide here as additional reading:

https://techcommunity.microsoft.com/t5/exchange-team-blog/exchange-online-email-applications-stopped-signing-in-or-keep/ba-p/3641943

Exchange Online email applications stopped signing in, or keep asking for passwords? Start here. - Microsoft Community Hub


And if your ISP is Comcast...


Comcast likely has gone to something like this...


Turn Your Access to Third Party Email Programs On/Off in Xfinity Email

To provide our customers with additional security, we added a new checkbox to the Xfinity Email website. This may affect your ability to manage your Xfinity Email (Comcast.net) through third-party programs like Outlook, Google, Apple Mail, Thunderbird and more.

These programs could expose your Xfinity ID and password to fraud and other risks, including the potential for external programs to read, download and delete emails on your behalf.



If you currently use a third-party program to read your email, the security setting is checked by default. If you don’t currently use a third-party program, the setting is unchecked and you won’t have access to these programs. You can easily change this setting at any time by checking the box and turning on access. Here’s how.

How To Update Email Security Settings

Sign in to Xfinity Email using your Xfinity ID and password.

In the top-right corner, click the Gear icon, then select Settings.

Click Security.

Uncheck the box under Third Party Access Security to prevent third-party programs access to your Xfinity Email, or check the box to allow access.


FAQs

Can I still access my Xfinity Email account (Comcast.net) through a third-party program after I check the security box?

Yes, you can manage your Xfinity Email through third-party programs when the Access Security box is checked. If this box is unchecked, you’ll receive an error message when you try to set up your Xfinity Email through a third-party program.

We recommend accessing your Xfinity Email from the Xfinity Email website.

Will this impact me if I have third-party email on my Xfinity account?

No. If you already have a third-party email on your account for verification purposes, you won't be impacted.

What will happen if I don’t disable third-party access?

If you continue to access your Xfinity Email account through a third-party client, you may be more susceptible to potential credential fraud.

Will changing the email security settings affect how I receive emails or manage my mailbox?

If you don’t have the Access Security box checked, you may receive an error message when you try to set up your Xfinity Email through a third-party program. This is the only change you may experience.

https://www.xfinity.com/support/articles/third-party-email-access


Oct 21, 2024 8:52 AM in response to RGar53

My problem is similar but not same. I am not using any fancy systems like IMAP, etc. My Outlook is a Tab on the Safari page. After updating to Sequoia 15 and 15.0.1, the connection to Outlook is erratic. Some times I can't open Outlook at all. This morning I received the 404 message. Some times I would connect to the Outlook and see the In- Box, but can't access other folders, like the Junk Folder, with the message "Can't Acces Now, please try later". When I access Outlook via Chrome, I have no problems. There is definitely some problem with 15 and 15.0.1 updates of Safari and the Microsoft Outlook. Apple should look into this soon and issue an update. Please.

Problem signing to IMAP email accounts with MacOS 15.0 and 15.0.1 updates.....

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