In an email circulated to various mailing lists yesterday, AT&T network administrators urged business partners and customers to provide the IP addresses of their outgoing mail servers, as part of an urgent situation with our anti-spam list.

It aims to restrict incoming mail to known and trusted sources, with the IP addresses used by outbound e-mail services required in order for emails to be accessed.

The company has been getting an inordinate amount of spam over the last couple of days, with reports of email not being able to get through to AT&T employees the result of the volume of spam, rather than the white-list.

Whether the white-list measure is actually in place, if it will be a permanent policy, or if it is in response to a specific incident has not been clarified.

This article was based on material originally published by ComputerWire.