- Plesk for Linux
Mail delivery to particular domains fails with the following error message in
CONFIG_TEXT: 0572C2801E1: uid=30 firstname.lastname@example.org
0572C2801E1: email@example.com, size=3826, nrcpt=1 (queue active)
0572C2801E1: host mx.example.net refused to talk to me: 554 IP=IP_ADDRESS - A problem occurred. (Ask your postmaster for help or to contact firstname.lastname@example.org to clarify.) (BL)
When manually connecting to the remote server from the error message (In this example, mx.example.net) using the telnet utility, connection fails:
# telnet mx.example.net 25
Connected to mx.example.net.
Escape character is '^]'.
554 IP=IP_ADDRESS - A problem occurred. (Ask your postmaster for help or to contact email@example.com to clarify.) (BL)
Connection closed by foreign host.
Error code 554 means IP-Blocking: A remote mail server is not currently accepting emails from a server IP address. This IP blocking may be due to a previously observed unusual volume of emails at the IP address concerned.
Contact administrator of a remote mail server.
For more information about a blacklisted mail server, see this KB article: