Hi,
Most of my mails are delivered and send without problems. However
some domains reject e-mails with the error message below. What can I
do to fix this? Is this a DNS error? Or a postfix config problem?
Thanks in advance!
<>: host mxb.mail.widexs.nl[213.206.122.196] said:
550-Verification failed for <i...@redmijncomputer.nl> 550-It appears that
the DNS operator for redmijncomputer.nl 550-has installed an invalid MX
record with an IP address 550-instead of a domain name on the right hand
side. 550 Sender verify failed (in reply to RCPT TO command)
# cat /etc/hosts
127.0.0.1 localhost
127.0.1.1 mail.redmijncomputer.nl
192.168.1.101 mail.redmijncomputer.nl
# The following lines are desirable for IPv6 capable hosts
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts
# postconf -n
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
config_directory = /etc/postfix
content_filter = amavisfeed:[127.0.0.1]:10024
delay_warning_time = 4h
inet_interfaces = all
mailbox_command = procmail -a "$EXTENSION"
mailbox_size_limit = 0
mailbox_transport = zarafa:
mydestination = redmijncomputer.nl, Desktop-1, localhost.localdomain, localhost
myhostname = mail.redmijncomputer.nl
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
myorigin = /etc/mailname
readme_directory = no
recipient_delimiter = +
relay_domains = redmijncomputer.nl
relayhost =
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_banner = $myhostname ESMTP $mail_name
smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtpd_use_tls = yes
virtual_alias_maps = mysql:/etc/postfix/mysql-aliases.cf
