Cpanel - exim - The account or domain may not exist, they may be blacklisted, or missing the proper dns entries.

Ошибка вида:

# exim -bt box@s15.server.net
box@s15.server.net is undeliverable: The mail server could not deliver mail to box@s15.server.net.  The account or domain may  not exist, they may be blacklisted, or missing the proper dns entries.

решается добавлением домена в файлы:

# cat /etc/localdomains | grep s15.server.net
s15.server.net
# cat /etc/remotedomains | grep s15.server.net
s15.server.net

и добавлением в exim.conf строки:

# egrep allow_mx /etc/exim.conf
allow_mx_to_ip = yes