stat=Deferred: 451-Non-existent domain mailserver.com

Jul 11 15:20:58 tor sendmail[9617]: r6AKjOD07: to=

mailserver.com was the hostname of the server, sendmail sends this by default and many mailservers will reject mail to a hostname that does not resolve or exist.

The easiest way is just to change the hostname and make sure it does resolve to something.

I read there is a way in sendmail.mc to manually set a hostname but I never got it working:

vi /etc/mail/sendmail.mc
define(`confDOMAIN_NAME', `mail.yourdomain.com')dnl


Tags:

stat, deferred, existent, domain, mailserver, comjul, tor, sendmail, akjod, hostname, server, default, mailservers, reject, resolve, easiest, mc, manually, vi, etc, define, confdomain_name, yourdomain, dnl,

Latest Articles

  • Cisco Router Setup Guide and Tutorial Howto With Commands and Examples
  • Linux Bash Script To List All Connected IPs and their network name
  • Cisco Switches How To Get Of Port Line Status Console Messages
  • Cisco DHCP Snooping Relay Setup Information
  • Cisco Switch Setup Guide Command List
  • Cisco 2960 Switch Reset To Factory Defaults
  • How To Boot Cisco CUCM UCSInstall 8.6, 10, 11 and 12 on KVM/Proxmox
  • VBOX VirtualBox How To Import Raw .img Disk File
  • Windows Server 2012, 2016, 2019 How To Install and Missing Disabled Telnet Client
  • proxmox vm networking breaks when you restart your network on the hostnode
  • Linux ln symlink how to update existing symbolic link
  • Ubuntu 18.04 / Linux Mint 19.1 Cannot Type or Login - solution
  • LUKS Hard Drive Encryption on Linux Mint Ubuntu Debian etc how to mount encrypted hard drive
  • How to use nmap locate other machines/computers/servers on your network using nmap
  • Linux Mint 18.2 Create Config File To Start Application Upon Login
  • Dell Wyse Thin Client BIOS Access Key
  • sudoers file in /etc warning about comments/includes!
  • Centos 7 Reallocate logical volume space to another
  • lvm how to reduce volume size
  • letsencrypt certbot error "Unable to find a virtual host listening on port 80 which is currently needed for Certbot to prove to the CA that you control your domain. Please add a virtual host for port 80."