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mark.reinhold at mark.reinhold at
Fri Dec 3 13:46:18 PST 2010

> Date: Thu, 2 Dec 2010 21:55:13 +0000
> From: Dr Andrew John Hughes <ahughes at>

> Recently, myself and others at Red Hat have been noticed big delays
> with the OpenJDK mailing lists.  Posts will appear on the on-line
> archives almost immediately but it can be hours before they reach our
> inboxes.
> Any idea what's going on?

Yep, but it took me a while to figure it out.

Outbound messages from don't go directly to the
net, they go through an internal SMTP relay first.  Recently that relay's
spam-checking rules have been beefed up, so it's doing lots of DNS
queries on every message, many of which are very slow.  I've tweaked our
Mailman configuration to use 32 parallel outgoing-queue runners, and the
queue is now clear.

If that doesn't fix the problem long-term then we'll see if we can get
the relay reconfigured, though it's not in our direct control.

- Mark

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