[Mailman-Users] Fatal Bounces ONLY on ATT (Bellsouth).NET

2021-03-13 Thread steve lund
Hello, It appears to be starting again for our list. Fatal bounces but ONLY on ATT.net. Here is what Google says: DMARC and DKIM passed. However, this may have been the bounce message to me. Below is the bounce message to me. I see a DKIM Pass and a DKIM Fail. Can anyone shed any other light as

[Mailman-Users] Re: Fatal Bounces ONLY on ATT (Bellsouth).NET

2021-03-13 Thread Mark Sapiro
On 3/12/21 1:39 PM, steve lund wrote: > Hello, > > It appears to be starting again for our list. Fatal bounces but ONLY on > ATT.net. Here is what Google says: ... > <...@att.net>: host ff-ip4-mx-vip1.prodigy.net[144.160.159.21] said: 553 > 5.3.0 flpd599 DNSBL:RBL 521< 45.33.97.191 >_is_block

[Mailman-Users] Re: Fatal Bounces ONLY on ATT (Bellsouth).NET

2021-03-13 Thread Brian Carpenter
On 3/13/21 11:00 AM, Mark Sapiro wrote: As of 03:30 PST this morning the block had not been removed. -- Mark Sapiro The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan There is definitely an increase in AT&T blocking mail servers recently. I had

[Mailman-Users] Re: Fatal Bounces ONLY on ATT (Bellsouth).NET

2021-03-13 Thread Mark Sapiro
On 3/13/21 10:33 AM, Brian Carpenter wrote: > > Too date, AT&T has never > presented any evidence for their decision to block one our IP addresses. My experience in dealing with blocks by ATT, Microsoft and other ISPs is that they (eventually) remove the blocks, but never once have they provided

[Mailman-Users] Re: Fatal Bounces ONLY on ATT (Bellsouth).NET

2021-03-13 Thread Keith Seyffarth
On 3/13/21 11:51 AM, Mark Sapiro wrote: On 3/13/21 10:33 AM, Brian Carpenter wrote: Too date, AT&T has never presented any evidence for their decision to block one our IP addresses. My experience in dealing with blocks by ATT, Microsoft and other ISPs is that they (eventually) remove the blo

[Mailman-Users] Re: Fatal Bounces ONLY on ATT (Bellsouth).NET

2021-03-13 Thread Mark Sapiro
On 3/13/21 12:17 PM, Keith Seyffarth wrote: > On 3/13/21 11:51 AM, Mark Sapiro wrote: >> >> My experience in dealing with blocks by ATT, Microsoft and other ISPs is >> that they (eventually) remove the blocks, but never once have they >> provided me with any evidence of the alleged problem email. >

[Mailman-Users] Re: Fatal Bounces ONLY on ATT (Bellsouth).NET

2021-03-13 Thread steve lund
Mark, Thanks for your response. So ATT is apparently blocking the email server of our website host.I have notified our web host so hopefully something good will happen eventually. BTW, so what is this "Registering" an email server with an ISP domain? I assume that it is basically telling them tha

[Mailman-Users] Re: Fatal Bounces ONLY on ATT (Bellsouth).NET

2021-03-13 Thread Brian Carpenter
On 3/13/21 7:15 PM, steve lund wrote: Thanks for your response. So ATT is apparently blocking the email server of our website host.I have notified our web host so hopefully something good will happen eventually. BTW, so what is this "Registering" an email server with an ISP domain? I assume that