Re: [mailop] MessageLabs "cluster1a*" MX records

2021-01-26 Thread Luke via mailop
Super interesting, and very helpful. Thanks Paul. Luke On Tue, Jan 26, 2021 at 9:37 AM Paul Gregg wrote: > On Tue, Jan 26, 2021 at 03:52:49AM -0700, Luke via mailop wrote: > > Starting very precisely on January 6th, we started to see a number of > > previously reliable domains turn up with seco

Re: [mailop] MessageLabs "cluster1a*" MX records

2021-01-26 Thread Paul Gregg via mailop
On Tue, Jan 26, 2021 at 03:52:49AM -0700, Luke via mailop wrote: > Starting very precisely on January 6th, we started to see a number of > previously reliable domains turn up with secondary MX records that look > like these: > > cluster1a.us.messagelabs.com > cluster1a.eu.messagelabs.com > cluster

[mailop] MessageLabs "cluster1a*" MX records

2021-01-26 Thread Luke via mailop
Starting very precisely on January 6th, we started to see a number of previously reliable domains turn up with secondary MX records that look like these: cluster1a.us.messagelabs.com cluster1a.eu.messagelabs.com cluster1a.uk.messagelabs.com The domains with these secondary records have primary mx