AT&T tells customers their email addresses won't access Yahoo, Tumblr, Flickr accounts

AT&T has notified customers of its email services that they won't be able to log into Yahoo websites after June 30 using their AT&T accounts.

The Dallas-based telecom is urging those who have AT&T email addresses and want to continue to use sites like Flickr, Tumblr, and Yahoo groups to transfer their data to a new Yahoo email address this week so they don't lose any data.

The AT&T domains that affected include: att.net, ameritech.net, bellsouth.net, flash.net, nvbell.net, pacbell.net, prodigy.net, sbcglobal.net, snet.net, swbell.net, and wans.net.

If you have an email with one of those domains, Yahoo websites will not be accessible after June 30. But you do not need a new email address to continue to receive emails as normal.

The web site TechCrunch says the reason for the switch is that after the Yahoo merger with AOL under the Oath brand, the companies wanted to streamline their partnerships. Yahoo's previous deal with AT&T let the company's domains serve as "quasi-Yahoo," accounts, the site said.

Verizon announced last year that it was buying Yahoo's internet business and would merge it with its AOL unit.