juvamine 0 Posted June 12, 2017 Hi, For several days we have received blocked smtp address notifications. Diagnostic-Code: smtp; 554 5.7.1 Service unavailable; Client host [our IP] blocked using bl.spamcop.net; Blocked - see http://www.spamcop.net/bl.shtml?our IP After checking, our address does not appear in your blacklist What can we do to make our emails no longer blocked? Share this post Link to post Share on other sites
Derek T 0 Posted June 12, 2017 You have witheld the one piece of information that we need to be able to help: the IP. Share this post Link to post Share on other sites
lisati 0 Posted June 12, 2017 The IP address is there. I checked using an online blacklist checking site, and the good news is that the IP address apprears clean. Share this post Link to post Share on other sites
juvamine 0 Posted June 12, 2017 2 hours ago, Derek T said: You have witheld the one piece of information that we need to be able to help: the IP. 217.167.0.242 Share this post Link to post Share on other sites
Lking 0 Posted June 12, 2017 if you start at https://www.spamcop.net/spamstats.shtml you can get to https://www.talosintelligence.com/reputation_center/lookup?search=217.167.0.0%2F24 It has been observed that sometimes ISPs use a standard "SpamCop blocklist" reason for rejecting an email even when they have used some other reason, i.e. updated their filter but not bothered to update their canned message. Share this post Link to post Share on other sites