Verizon.net and 421 errors
Tom Diehl
I seem to be having a problem with sending mail to verizon.net addresses.
Their server returns the following:
Dec 5 05:22:43 marge postfix/smtp[15918]: 78697421E: to=<valid...@verizon.net>, relay=relay.verizo
n.net[206.46.170.12], delay=242913, status=deferred (host relay.verizon.net[206.46.170.12] said: 421
sc017pub.verizon.net failed to connect (in reply to RCPT TO command))
I see these errors until the message times out. At first I thought it was
just a flaky server on their end but after doing a little goggling I found
some references to verizon using some sort of callback mechanism and some
problems wrt to timing on sendmail systems. I have been unable to find anything
on this wrt postfix configuration.
My question is has anyone else seen/heard of this? If so how do I go about
troubleshooting/fixing it so that my customers can send mail to verizon.net
addresses?
The server in question is running postfix 2.1.0 on RHEL 3. I am not sure if
a postconf -n will be useful of not but here it is just in case:
(marge pts2) # postconf -n
alias_database = hash:/etc/postfix/aliases hash:/etc/postfix/local.maps/local.aliases
alias_maps = hash:/etc/postfix/aliases hash:/etc/postfix/local.maps/local.aliases
biff = no
body_checks = pcre:/etc/postfix/common.maps/body_checks
bounce_queue_lifetime = 1d
command_directory = /usr/sbin
config_directory = /etc/postfix
content_filter = smtp-amavis:[localhost]:10024
daemon_directory = /usr/libexec/postfix
debug_peer_level = 2
disable_vrfy_command = yes
header_checks = pcre:/etc/postfix/common.maps/header_checks
html_directory = /usr/share/doc/postfix-2.1.0-documentation/html
local_recipient_maps = proxy:unix:passwd.byname $alias_maps
mail_owner = postfix
mailbox_command = /usr/bin/procmail -t
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
maximal_queue_lifetime = 3d
mime_header_checks = regexp:/etc/postfix/common.maps/mime_header_checks
mydestination = $myhostname
localhost.$mydomain
marge.sitelink.com
myhostname = mail2.sitelink.com
myorigin = $mydomain
newaliases_path = /usr/bin/newaliases.postfix
owner_request_special = no
queue_directory = /var/spool/postfix
recipient_delimiter = +
relay_domains = $mydestination
/etc/postfix/sitelink.maps/relay_domains.sitelink
relay_recipient_maps =
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
smtp_helo_name = mail2.sitelink.com
smtpd_client_restrictions =
smtpd_helo_restrictions = check_client_access hash:/etc/postfix/common.maps/client_access
smtpd_recipient_restrictions = permit_mynetworks
reject_unauth_destination
check_sender_access hash:/etc/postfix/common.maps/sender_checks
check_recipient_access hash:/etc/postfix/common.maps/spamtrap
hash:/etc/postfix/sitelink.maps/recipient_checks
reject_non_fqdn_sender
reject_non_fqdn_recipient
reject_unknown_recipient_domain
reject_unauth_pipelining
reject_unauth_destination
reject_invalid_hostname
reject_non_fqdn_hostname
reject_unknown_sender_domain
reject_rbl_client bl.spamcop.net
reject_rbl_client sbl.spamhaus.org
permit
smtpd_restriction_classes = match_client_domain
smtpd_sender_restrictions = check_sender_access hash:/etc/postfix/common.maps/sender_whitelist
hash:/etc/postfix/common.maps/spoof_sender_map
transport_maps = hash:/etc/postfix/sitelink.maps/transport.sitelink
unknown_address_reject_code = 554
unknown_client_reject_code = 554
unknown_hostname_reject_code = 554
unknown_local_recipient_reject_code = 550
virtual_alias_maps = ldap:accountsmap ldap:aliases
virtual_gid_maps = static:102
virtual_mailbox_base = /home/vmail/domains
virtual_mailbox_domains = ldap:domains
virtual_mailbox_maps = ldap:accounts
virtual_minimum_uid = 102
virtual_transport = virtual
virtual_uid_maps = static:102
(marge pts2) #
Also would some mind looking at my restrictions above and make sure I am
not doing anything stupid?
Regards,
Tom