Fwd: Undelivered Mail Returned to Sender

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Just now and about 3 hours ago there was a something like a great dumping of queues on lists.ovirt.org. I've got a mix of bounces, new spammy sub requests to workshop-nov2011, and so forth. Anybody trigger this? If not, worth looking in to? Looks like ~100+ items through today for not apparent reason ... - -------- Forwarded Message -------- Subject: Undelivered Mail Returned to Sender Date: Mon, 24 Aug 2015 19:45:13 -0400 (EDT) From: Mail Delivery System <MAILER-DAEMON(a)linode01.ovirt.org&gt; To: mailman-bounces(a)ovirt.org This is the mail system at host lists.ovirt.org. I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below. For further assistance, please send mail to postmaster. If you do so, please include this problem report. You can delete your own text from the attached returned message. The mail system <kemo.mart+74573662(a)gmail.com&gt;: host gmail-smtp-in.l.google.com[2607:f8b0:400e:c00::1b] said: 550-5.2.1 The user you are trying to contact is receiving mail at a rate that 550-5.2.1 prevents additional messages from being delivered. For more 550-5.2. 1 information, please visit 550 5.2.1 https://support.google.com/mail/answer/6592 qn10si29889443pbc.109 - - gsmtp (in reply to RCPT TO command)