Re: [Mailman-Users] Non-Delivery of Mail

2017-01-29 Thread Barry S. Finkel
On 1/28/2017 12:26 PM, David Andrews wrote: I run a cPanel system that, among other things, supports about 300 Mailman lists. We have about 20,000 users. I am getting lots of bounced messages from roadrunner.com and various XXX.rr.com domains. It looks like they may be blocking my domain nfbnet.o

Re: [Mailman-Users] Non-Delivery of Mail

2017-01-28 Thread Mark Sapiro
On 01/28/2017 10:26 AM, David Andrews wrote: > > When I look at a mail delivery report via cPanel, I see messages that > say 421 too many concurrent connections, connection refused. What can I > change to fix this problem! That's a retryable error and may or may not eventually be successfully r

[Mailman-Users] Non-Delivery of Mail

2017-01-28 Thread David Andrews
I run a cPanel system that, among other things, supports about 300 Mailman lists. We have about 20,000 users. I am getting lots of bounced messages from roadrunner.com and various XXX.rr.com domains. It looks like they may be blocking my domain nfbnet.org although I am not sure how you tell.