Slack apologized for its misguided account bans, has reactivated closed accounts

The banned Slack accounts are coming back.

On Friday evening, Slack issued a mea culpa for what some were calling "discriminatory" account bans, made in an effort to comply with U.S. economic sanctions.

"We acknowledge that we made several mistakes here," Slack wrote in a blog post. "Our attempts to comply with these regulations were not well-implemented. In our communications, we did not treat our customers and other users with the respect they deserve."