MessageLabs versus GMail
MessageLab mail forwarders have been unwilling to talk to GMail servers at least since Saturday 2008-03-29, with a mix of TCP “connection refused” and SMTP “421 Service Temporarily Unavailable”.
Perhaps it’s related to flurry of articles about GMail CAPTCHA cracking three weeks ago and the resulting surge of spam.
Whatever the reason, it’s a painful outage.
Followup, Tuesday 2008-04-01 7:48am EDT:
MessageLabs appears to be listening to GMail’s servers again. New messages are flowing. I haven’t seen the messages queued up during the outage, yet.
More detail on the Google CAPTCHA-cracking botnet.
