Some clients may be experiencing intermittent issues delivering mail to email addresses at Yahoo domains. The bounce message incorrectly indicates that the sender is blacklisted on one of the Spamhaus blacklists. This issue has been ongoing since approximately May 22nd, 2009.
Note that Yahoo appears to be bouncing this mail in error. No ExactTarget IP address is blacklisted by Spamhaus. Also note that various industry sources have indicated that this issue is not specific to ExactTarget. List managers utilizing other email service providers (or sending via their own server) are also running into this issue.
On May 27th, Yahoo sent the following notice to the Yahoo Mail Admin email list: "We have received reports that some senders are seeing intermittent IP blocks when sending to Yahoo! Mail, with the SMTP error message from us citing that the block was due to a Spamhaus listing -- e.g., "553 5.7.1 [BL21] Connections not accepted from IP addresses on Spamhaus PBL." (See our full list of SMTP error messages at http://postmaster.yahoo.com/errors/ <http://postmaster.yahoo.com/errors/> .)
If your IPs are currently not listed on any Spamhaus blocklist but you are seeing this error, please be assured that we are looking into the matter. We shall post an update once we have resolved the issue."
Spamhaus noted this issue on their blog on May 30, 2009, referring to the blocking of mail under these circumstances as "erroneous."
Note that we have been working directly with Yahoo on this issue throughout the past week, and will continue to do everything within our power to drive this issue toward resolution as quickly as possible. As the situation is out of our control, we are not able to provide an ETA for resolution.
If you have any questions, please contact ExactTarget's client success center or deliverability team through the usual channels. We'll be sure to update everyone with more information as soon as possible. (Click here to sign up for this blog's RSS feed.)
Note that Yahoo appears to be bouncing this mail in error. No ExactTarget IP address is blacklisted by Spamhaus. Also note that various industry sources have indicated that this issue is not specific to ExactTarget. List managers utilizing other email service providers (or sending via their own server) are also running into this issue.
On May 27th, Yahoo sent the following notice to the Yahoo Mail Admin email list: "We have received reports that some senders are seeing intermittent IP blocks when sending to Yahoo! Mail, with the SMTP error message from us citing that the block was due to a Spamhaus listing -- e.g., "553 5.7.1 [BL21] Connections not accepted from IP addresses on Spamhaus PBL." (See our full list of SMTP error messages at http://postmaster.yahoo.com/errors/ <http://postmaster.yahoo.com/errors/> .)
If your IPs are currently not listed on any Spamhaus blocklist but you are seeing this error, please be assured that we are looking into the matter. We shall post an update once we have resolved the issue."
Spamhaus noted this issue on their blog on May 30, 2009, referring to the blocking of mail under these circumstances as "erroneous."
Note that we have been working directly with Yahoo on this issue throughout the past week, and will continue to do everything within our power to drive this issue toward resolution as quickly as possible. As the situation is out of our control, we are not able to provide an ETA for resolution.
If you have any questions, please contact ExactTarget's client success center or deliverability team through the usual channels. We'll be sure to update everyone with more information as soon as possible. (Click here to sign up for this blog's RSS feed.)
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