550 5.5.1 protocol error

  1. B

    550 5.5.1 Protocol error

    Mar 03 17:15:55 xxxxx postfix/postscreen[20214]: PREGREET 26 after 0.04 from [xxx.xxx.xxx.xxx]:60268: EHLO MGTEXC12.xxxx.com\r\n Mar 03 17:15:55 xxxxx postfix/postscreen[20214]: NOQUEUE: reject: RCPT from [xxx.xxx.xxx.xxx]:60268: 550 5.5.1 Protocol error What is the reason I have been getting...


The Proxmox community has been around for many years and offers help and support for Proxmox VE, Proxmox Backup Server, and Proxmox Mail Gateway.
We think our community is one of the best thanks to people like you!

Get your subscription!

The Proxmox team works very hard to make sure you are running the best software and getting stable updates and security enhancements, as well as quick enterprise support. Tens of thousands of happy customers have a Proxmox subscription. Get yours easily in our online shop.

Buy now!