For the second time this month, some Office 365 users in North America are experiencing problems with e-mail.
Over a period of several hours, some of iCloud's critical features, including account sign-in, email, and backup, slowed down for about 40 percent of users.
As of late Tuesday night, users of Microsoft's online mail services have been bumping into trouble syncing and sending mail.
Google's data shows Gmail traffic slowly rising again in China after a four-day outage.
It's happened before, apparently, but the timing of this outage is notable, following as it does on Facebook's staggering-sum purchase of the messaging app.
Repairs and security upgrades are being made during planned outage after "activity of concern" was detected, officials tell the Associated Press.
Yahoo has apologised for an outage to its Yahoo Mail service that has lasted since Tuesday morning UK time.
The e-mail service hits day two of its partial outage, and the company promises to restore access by 3 p.m. PT.
The Cupertino, Calif., electronics giant doesn't always get it right. CNET details some of Apple's biggest and most recent screw-ups.
The company's CEO apologized for Yahoo Mail's prolonged, multiday outage.