Lking

Looks to me like "your spammer" has not configured their tool correctly.

Z-Man you need to talk to your email provider. The whitelist of domains should happen first, before checking IPs on any block list. Whitelisting a domain should bypass the check for spamming IPs. Yes, SCBL is a dynamic list of IP addresses that are currently spamming. You should NOT have to get you clients to change ISP. You should get Hostgator to configure their mail server so that the whitelist of your client's domain bypasses the filtering of incoming email based on a block list.

No there is not a list of "Safe IP addresses." On the bright side, unlike other block lists the SCBL will automatically remove an IP 24 hours after offending emails stop. When I checked, the Mailgun IP you provided is not currently on the SCBL. However, mailgun / mailgun clients is/are your problem. As with other threads in this forum involving Microsoft, the problem is an email service that share IP address with several email clients. If one clients sends spam all clients get blocked based on the common IP address. FYI: Assuming you are not "Baerskin Tactical <new{AT}email{DOT}baerskintactical{DOT}com>" they are also a user of Mailgun. This user of Mailgun have been sending me/my domain 'unsolicited commercial email ' for several weeks. In addition to some spam sent to valid mailboxes, spam have also been sent to mailboxes (some quite vulgar) at my domain that have never been used. Good luck with your B2B. It can be a tough enterprise. Some times "For a few dollars more" to use a spam conscious mass mailer is worth the added cost.

SpamCop is owned by Cisco Systems, Inc. You could have checked the copyright on https://www.spamcop.net/

As can be seen at https://www.spamcop.net/w3m?action=blcheck&ip=40.107.220.133 This is up from 7 hrs shortly after your first post. This means the IP continues to send email to spam traps. No one here can help you fix that. If you do not have a dedicated IP for your outgoing email, that is between you and your ISP.

Did you follow the link? and see the email was blocked because: Also notice that: If there are no reports of ongoing objectionable email from this system it (your IP) will be delisted automatically in approximately 7 hours. To your request, generally there are two possible causes for the IP address used by your email service being listed on SCBL: 1) Your email list includes addresses scraped from the internet that point to spam traps, or 2) your email service shares an IP address with another users who have sent emails to spam traps. Based on your post, your client uses an email service which uses SCBL to filter their incoming email. If your client wishes to receive your email in spite of being listed as a source of spam, they may be able to white list the IP address used by your email service. It is strongly suggested that you scrub your email list to assure only double-opt-in email addresses are included. After assuring you are not sending spam talk to your ISP to avoid sharing an out going IP with others who do send spam.

As a flaky domain, there are several possibilities. At the time the parser looked the DNS tables were not configured correctly, or had not been fully distributed through the network. By the time you looked, and now, all DNS tables have been updated.

There are several other block list. I do not have experience any of them.

It is a Friday afternoon, my database crashed. It may be a good time to try to get a common understanding of "cause and effect" or who should be blame for what. It is true SpamCop is responsible for the SpamCop Block List, SCBL. Information about how the SCBL works may be helpful https://www.spamcop.net/fom-serve/cache/297.html Somethings to note within that link may help users have a better and safer experience. To state the obvious: SpamCop does not send spam, clogging the internet and people's inboxes with unwanted email. SpamCop does accept reports of spam received by others and use the results of spam traps to build a list of offending IP addresses. Unlike other block list, the SCBL automatically removes IPs shortly after spam stops. I would suggest that the problem of "Microsoft hosted emails being blocked" IS an issue for the ISP to resolve by not providing (free) service to senders of spam; NOT an issue for a service/organization reporting the spam trying to help the public in general filter their inbox. If a large ISP doesn't want to stop providing free service to clients they could consolidate offending spammers they support onto the same set of IP addresses. This would have a smaller effect on other clients. IIRC Microsoft has ask NOT to receive spam reports which would provide the information to separate spammers for other clients. TO be clear I am an unpaid volunteer on this forum, not a member of SpamCop, and these statements/opinions are mine and may not reflect official SpamCop policy. Years ago when I first started using the internet and email, I discovered the disadvantages of using email "included free" with dial-up internet service (yes I used a clay tablet). I changed ISPs to find service where I had more control over incoming email and a fixed dedicated outgoing IP address.

@Luis thank you for the additional information. Your client trying to send you email is using an IP address that is also responsible for sending spam. Some of those spam have been reported to SpamCop. Although 40.107.94.90 currently is not on the SCBL, if more spam are sent it will be returned to the block list. To help all (other) SCBL users, SC does not white list any IP addresses. If you want to receive email from an IP address known to send spam you need to talk to your email host/ISP and request they white list the IP address. It may be helpful to explain the situation to you client. They have standing with their ISP (Microsoft) to request more vigorous anti spam actions to improve the email service Microsoft provides.

@Luis from your post it is not clear to me if the IP address you gave is your outgoing email IP or the IP of the other party. As @gnarlymarley stated someone is reporting that IP as sending spam and as long as the spam/spam reports continue, the reported IP will remain on the SpamCop Block List (SCBL). When the spam stops the IP will automatically be removed from the SCBL. However, if spam resumes the IP will again be added to the SCBL. You can see the current status of the IP at https://www.spamcop.net/w3m?action=checkblock&ip=40.107.94.90 You can see additional information at the link https://www.spamcop.net/spamstats.shtml

@Foggy you are dead right. 1) No matter what the client does, if they are not willing to pay for a dedicated IP address for out going emails, they will never be in full control of their email and run the risk of someone else fouling the reputation of the IP address and there by their reputation. 2) Not using double opt-in email list, (and maybe buying email list) always runs the risk of getting complaints from people who don't want their in-box cluttered, or worst-case a spam-trap. I know preaching to the choir.

🙂

I'm guessing @Foggy does not know what IP address his mail server is using, so the link @petzl and I provided doesn't help much. @Foggy contact you ISP (who I guess host your domain and email service) to check if you have a dedicated email IP or a shared IP. The IP address used to send your emails is what needs to be entered into the form on the link @petzl provided. THAT will tell you why you are/have been listed on the SCBL. With that information you can take positive corrective action.

Interesting tool. Have you followed the SPAMCOP link in the report and read the help about when and why your IP is listed on the SCBL? IF no more emails from your IP are reported AND no more email to spam traps are received, your IP will automatically be removed from the SCBL. But that is only 1 of the 3.5 points this tool is deducting from your score.