[outages] AOL MX inbound servers failing?

[Joshua Boniface]

Hello everyone:

For the last few days I've been noticing mail queuing on our mail 
servers with errors like this:

(delivery temporarily suspended: host 
mailin-03.mx.aol.com[205.188.190.2] refused to talk to me: 421 
mtain-df04.r1000.mx.aol.com Service unavailable - try again later)

The errors are transient, as forcing delivery tends to send them 
through. It's happening on many mail servers so it isn't a DNSBL problem 
on our end.

Has anyone else noticed this?

Thanks,
Joshua Boniface