Emails sent to Yahoo are rejected with the SMTP error "553 Mail from X.X.X.X 5.7.1 Connections not accepted from IP addresses on Spamhaus XBL"

Products

• Mail Security for Domino
• Mail Security for Microsoft Exchange
• Messaging Gateway

Issue/Introduction

You are unable to send Email to Yahoo mailboxes with your sending mail server reporting the SMTP error "553 Mail from X.X.X.X 5.7.1 Connections not accepted from IP addresses on Spamhaus XBL".

Symptoms
Emails sent through your Symantec Mail Security product cannot be delivered to Yahoo mailboxes, but can be delivered to mailboxes belonging to most other domains.

 

Environment

Email Security.cloud

Cause

If Yahoo's mail service is rejecting your Email. The external Internet Protocol (IP) Address of your sending mail server appears to be on a Spamhaus Blacklist used by Yahoo's mail service.

Resolution

Request the removal (whitelisting) of your IP address from Spamhaus's Blacklist service by going to the URL below:

http://www.spamhaus.org/lookup.lasso

Further information can be found at the following Yahoo article:

550 5.7.1 [BL23] Connections not accepted from IP addresses on Spamhaus XBL
https://senders.yahooinc.com/smtp-error-codes