Lots of Soft Bounces Recently
Has anyone noticed a lot of soft bounces recently for the below domains recently:
We have sent to these domains before with no problem, however in a send last week we received the below server responses:
smtp; 550 5.2.0 Mail rejete. Mail rejected. ofr_506 
delivery temporarily suspended: host smtpz4.laposte.net
refused to talk to me: 421 4.3.2 No system resources
delivery temporarily suspended: host smtp-in.orange.fr
refused to talk to me: 421 mwinf5c42 ME Trop de connexions, veuillez
verifier votre configuration. Too many connections, slow down. OFR004_104
smtp; 550 Too many spams from your IP ()
I looked up our Return Path Sender Score and it is 99 (not sure if that even matters anymore?).
Thanks so much!