Why they did not send this message out ahead of time is beyond me but here it is:
We're making some security improvements to your AT&T Yahoo! service. These changes will affect members who send or receive email from a desktop or mobile client program, such as Microsoft Outlook, Microsoft Outlook Express, Eudora, Apple Mail, or Thunderbird.
- Open your email client program.
- Locate the email account settings for your particular client.
- Change the POP server to pop.att.yahoo.com.
- Change the SMTP server to smtp.att.yahoo.com.
- Check the option labeled Use an encrypted connection (SSL) and change the SMTP port to 465.
- Check the option labeled Use an encrypted connection (SSL) and change the POP3 port to 995.
- Confirm the above settings then click OK.
That's about it. Good customer service would have been sending out an email notification a week or two in advance of this change. I have to wonder how many tech people like me were getting phone calls from relatives to fix their email.