yahoo mta admin help needed

Is there a Yahoo MTA admin listening who can help diagnose what might be a network ACL block to one of our SMTP server subnets?



Start by going to and describing symptoms (they're not going to respond well to mentions of ACL blocks, and will want to know what's actually happening in SMTP).
Also, timeouts on the Yahoo side are also rare in the extreme, so if your problem is that attempts time out or vanish into a black hole, I would start troubleshooting elsewhere.
Elizabeth Zwicky