helo

  1. R

    PTR records for Proxmox Mail Gateway - do I need a separate one for Relay Host?

    Problem: The PTR record does not match the HELO , Network configuration: • Main Mail server (Main Host): mail.example.com (IP: 192.168.1.10) • Relay server (Relay Host): mx.example.com (192.168.1.11) The main host and relay host have the same external Ip. • Both DNS records of A...
  2. N

    Cert from other Host (NGINX Proxy Manager)

    Hey guys, I was able to setup PMG yesterday and my mailcow behind it. Right now I run into the following issue that I get a reject on a receiving server ehlo/helo domain. F.e. my PMG got the hostname mailgateway.internal.local right now. My 1st: Is it just enough to change the hostname in...
  3. S

    [SOLVED] Change HELO hostname

    Hello, I have a question regarding Helo checks. I would like to change our Helo name to something different then our hostname of proxmox. The reason is that some mailservers who force Helo check are blocking our e-mails currently they see our internal hostname of proxmox server. In...