- Plesk for Linux
Emails sent from a specific mailbox on a Plesk server to an external mail server could not be delivered and are bounced back with one of the the following error messages:
PLESK_INFO: Client host rejected: Your message was rejected due to spam filtering.
PLESK_INFO: Mail rejected due to antispam policy
PLESK_INFO: firstname.lastname@example.org: too many hops Reporting-MTA: dns; srv02.example.net X-Postfix-Queue-ID: 59638154241A
One of the following messages appear in
CONFIG_TEXT: mail postfix/smtp: F21C9580BF0: email@example.com, relay=mail.example2.com[203.0.113.2]:25, delay=11, delays=0.08/0/1.5/9.7, dsn= 5.1.7, status=bounced (host mail.example.com[203.0.113.2] said: 550 5.1.7 <firstname.lastname@example.org>: Sender address rejected: undeliverable address: host mail.example.com[203.0.113.2] said: 550 5.7.0 Your server hostname [hostname.com] for IP [203.0.113.10] matches a pattern which was abusive in the past.. See http://spamauditor.org/best-practices/check_rev
CONFIG_TEXT: <email@example.com>: host mail.example.com[184.108.40.206] said:
550-"JunkMail rejected - (example.com) [203.0.113.2]:34390 is in an RBL
on 550-rbl.websitewelcome.com, see Blocked - see 550
CONFIG_TEXT: jdoe postfix/smtp: 73BD4219CF: host mx.example.com[203.0.113.2] refused to talk to me: 554 bosimpinc11 bizsmtp Connection refused. 203.0.113.3 has a poor reputation on Cloudmark Sender Intelligence (CSI). Please visit http://csi.cloudmark.com/reset-request/?ip=203.0.113.3 to request a delisting.
CONFIG_TEXT: jdoe postfix/smtp: 81F547DBAE: host mx6.mail.icloud.com[220.127.116.11] refused to talk to me: 550 5.7.0 Blocked - see https://support.proofpoint.com/dnsbl-lookup.cgi?ip=203.0.113.2
- In some cases, MXToolBox Blacklists checker might report that the domain or its IP address are blacklisted.
The domain/mailbox is blacklisted on the mail server, where emails are being sent. This might occur due to spam activity on a Plesk server.
Note: If you are a domain owner, contact your service provider for assistance.
Contact the system administrator of the remote server, that hosts a recipient's mailbox, to add the affected domain to white list.