My job involves (trying to) monitor the reputation of our ASN, so I have some experience here.
I think it's important to start by noting that reputation isn't something you can easily quantify. There is also no single authority deciding (or showing) what the repuation of a provider is. The real information I suspect you are looking for is in the filters of the large email providers, and those are more or less black boxes. In other words, neither Brandon nor Michael is going to tell you to move to Provider ABC because doing so will mean none of your emails will ever land in the spam folder of Gmail or Outlook again. There are simply way too many variables for that. What I can provide is a list of services that will give you, let's call it a hint, at the reputation that a provider might have. As far as I know there are currently 4 different DNSBLs that will show the amount of IPs in a single ASN that are blacklisted: http://www.uceprotect.net/en/rblcheck.php?asn=<number> https://www.megarbl.net/asn_list.php?asn=<number> http://suomispam.net/#!origin/AS<number> https://www.spamhaus.org/sbl/listings/<domain> --- Some quick notes about these: UCEPROTECT is nice in that it also shows you how many IPs are in a particular ASN. That allows you to figure out the percentage of blacklisted IPs, which (might?) mean more accuracy if you are looking at the reputation of the entire ASN. (ie. a company with one million IPs and 100 blacklisted might be better than a company with 100 IPs and 10 blacklisted.) MegaRBL has been down for the past 2 weeks, due to maintenance. No idea when it's going to come back. Suomispam is a niche blacklist, so has less listings, but will manually list /24s and /16s (which they have done for a number of cloud providers). With Spamhaus you'll need the main domain of the provider, not the AS number. Spamhaus also has a top 10 list of providers with the most SBL listings: https://www.spamhaus.org/statistics/networks/ --- SpamCop also provides some statistics, but you'll need to figure out which ASN the worst /24s and /16s that they show belong to: https://www.spamcop.net/spamstats.shtml Blocklist.de also has an ASN overview, though it is a blacklist based on network attacks, and not spam. I have no idea if, or how much, that influences the filters of larger email providers: https://www.blocklist.de/en/search.html Also important to note is that these (ASN) overviews are snapshots. If you check again a week later, the situation could look very different (though it usually doesn't change that much). Finally, apart from blacklists, there is Cisco Talos. You can search for a provider, and will see up to 1000 IPs, with each one having an email reputation. There is no overal reputation, and the website will only show up to 50 IPs at a time, but it is again a hint at the reputation of a provider: https://talosintelligence.com/reputation_center/lookup?search=<company name> I hope some of that is helpful. Bastiaan Am 21.10.2019 um 13:00 schrieb gustavo <[email protected]>: > Is there any service I can use to check the reputation of an ASN? > > I, like the OP, run my own personal email server and suffer from > difficulties reaching friends and family that i've never mailed before > (my first email go to spam folder, then they whitelist me and its all > fine) > > For the last ~6 years I'm in Linode but I'd be willing to change > hoster if I'm certain their IPs are better. But Is hard to know > beforehand and migrating an email server is not easy. > > I don't spam, and barely send out a few emails/month, I want to use a > hoster that is very strict about sending emails, but I don't know where > to look for. Buying a /24 is too expensive for personal usage. > > thanks > > PS: I know about http://multirbl.valli.org and others to check if my IP > is blacklisted, also have an script that runs from cron and alerts me if > I get into any blacklist (never happened, except for my IPv6 which I've > disabled since then) _______________________________________________ mailop mailing list [email protected] https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
