Email problems - SPF/DNS - Message aborted

[Red Paint]

Hello,

One of our domains is having problems receiving email from selected IP's.

This is happening for a selection of domains on our servers but a specific example can be found below:

From the maillog:

May  1 06:23:32 plesk spf filter[25550]: Error code: (26) DNS lookup failure
May  1 06:23:32 plesk spf filter[25550]: SPF result: tempfail
May  1 06:23:32 plesk /usr/lib64/plesk-9.0/psa-pc-remote[13289]: handlers_stderr: DEFER
May  1 06:23:32 plesk /usr/lib64/plesk-9.0/psa-pc-remote[13289]: DEFER during call 'spf' handler
May  1 06:23:32 plesk /usr/lib64/plesk-9.0/psa-pc-remote[13289]: Message aborted.
May  1 06:23:32 plesk postfix/cleanup[23168]: E461A66A71: milter-reject: END-OF-MESSAGE from eu1sys200aog103.obsmtp.com[207.126.144.115]: 4.7.1 Service unavailable - try again later; from=<[email protected]> to=<[email protected]> proto=SMTP helo=<eu1sys200aog103.obsmtp.com>
May  1 06:23:32 plesk postfix/smtpd[10248]: disconnect from eu1sys200aog103.obsmtp.com[207.126.144.115]

I've tried an spf query and it spits back the following:

# /usr/bin/spfquery_static -ip 207.126.144.155 -sender [email protected] -rcpt-to [email protected]
pass
spfquery: domain of newsint.co.uk designates 207.126.144.155 as permitted sender
Received-SPF: pass (spfquery: domain of newsint.co.uk designates 207.126.144.155 as permitted sender) client-ip=207.126.144.155; [email protected];

/etc/postfix/main.cf looks like this:

virtual_mailbox_domains = $virtual_mailbox_maps, hash:/var/spool/postfix/plesk/virtual_domains
virtual_alias_maps = $virtual_maps, hash:/var/spool/postfix/plesk/virtual
virtual_mailbox_maps = hash:/var/spool/postfix/plesk/vmailbox
transport_maps = hash:/var/spool/postfix/plesk/transport
smtpd_tls_cert_file = /etc/postfix/postfix_default.pem
smtpd_tls_key_file = $smtpd_tls_cert_file
smtpd_tls_security_level = may
smtpd_use_tls = yes
smtp_tls_security_level = may
smtp_use_tls = no
smtpd_timeout = 3600s
smtpd_proxy_timeout = 3600s
disable_vrfy_command = yes
mynetworks = 127.0.0.0/8 [::1]/128 ......
smtpd_sender_restrictions = check_sender_access hash:/var/spool/postfix/plesk/blacklists, permit_sasl_authenticated, check_client_access pcre:/var/spool/postfix/plesk/non_auth.re, reject_unknown_sender_domain, warn_if_reject reject_unverified_sender
smtp_send_xforward_command = yes
smtpd_authorized_xforward_hosts = 127.0.0.0/8 [::1]/128
smtpd_sasl_auth_enable = yes
smtpd_recipient_restrictions = permit_mynetworks, check_client_access pcre:/var/spool/postfix/plesk/no_relay.re, permit_sasl_authenticated, reject_unauth_destination
virtual_mailbox_base = /var/qmail/mailnames
virtual_uid_maps = static:110
virtual_gid_maps = static:31
virtual_transport = plesk_virtual
plesk_virtual_destination_recipient_limit = 1
mailman_destination_recipient_limit = 1
smtpd_client_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_rbl_client sbl.spamhaus.org
myhostname = plesk.redpaint.co.uk
message_size_limit = 20480000
smtpd_milters = inet:localhost:12768
non_smtpd_milters = inet:localhost:12768
sender_dependent_default_transport_maps = hash:/var/spool/postfix/plesk/sdd_transport_maps

It's a strange one and I'm not sure what's going on but something is preventing these emails from being delivered.

Any thoughts?

 

[Red Paint]

This is still happening. Trying to understand and rectify the problem, are we the only ones experiencing this?

 

[HostaHost]

Did you ever find a solution to this?