Bastian Blank: > On Thu, Feb 08, 2018 at 09:43:51PM -0800, motty cruz wrote: > > I am trying to figure out why my Postfix disconnect after EHLO command. A > > customer is trying to email me something but Postfix disconnect: ( on the > > customer side this is the bounced message "Remote Server returned '< > > spring1.mydomain.com #5.0.0 smtp; 554 Security violation. Email Session > > ID:" ) > > This is no Postfix messages. According to Google this is some MtM > device.
You need to find out why *THEIR* firewall is refusing to deliver mail. Wietse