Contributor
•
20 Messages
Emails Bounce with 553 Error
Emails to several contacts bounce with -
Reporting-MTA: dns; omta02.potomac.co.businessclass.comcast.net [76.96.107.72]
Received-From-MTA: dns; XXX [50.199.226.81]
Arrival-Date: Thu, 03 Oct 2013 14:37:30 +0000
Final-recipient: rfc822; yyy@zzz.com
Action: failed
Status: 5.1.1
Diagnostic-Code: smtp; 553 Your IP [76.96.107.72] is on one or more DNS blacklists. ulc: 9223369036848139923, rcp: 0001. (#5.1.1)
Last-attempt-Date: Thu, 03 Oct 2013 14:37:30 +0000
Am I right to interpret this error as Comcast DNS on blacklist?
Accepted Solution
Comcast_Jon
Administrator
•
1.5K Messages
11 years ago
Hello gilh799,
Welcome to the forum.
Community would like to assist, but could clarify a few items for us?
1. What are you using to send the email, webmail or email client?
2. Do you know when this started?
3. What is your domain name?
Thank you
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Accepted Solution
gilh799
Contributor
•
20 Messages
11 years ago
1. Emails being sent from Outlook 2010.
2. Started 9/30/13
3. Domain bco-inc.com
We have found
http://www.spamcop.net/spamstats.shtml
leading to
http://www.senderbase.org/lookup/ip?search_string=76.96.107.71
IP Address 76.96.107.71
Listed (as of 10/8/13)
10/8/2013 9:05:17 AM 4 hours ago
10/8/2013 7:52:17 AM 5 hours ago
10/8/2013 7:28:36 AM 5 hours ago
10/4/2013 9:17:44 AM 4 days ago
10/4/2013 7:28:31 AM 4 days ago
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Accepted Solution
Comcast_Jon
Administrator
•
1.5K Messages
11 years ago
Hello gilh799,
Thank you for the reply.
We have an informational post (link) to address this issue.
Thank you for your patience
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Accepted Solution
lauchlanworks
New Member
•
2 Messages
11 years ago
Those are not the only two that are blocked . . . we've had problems at our office as well,
76.96.107.73 is also among the blacklisted servers . . .
76.96.107.71
76.96.107.72 and
76.96.107.73
. . . are all being rejected.
-BJE (Lauchlanworks IT)
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