I'm currently testing using Amazon SES for my outbound list mail. Here's a few different return-path addresses from posts to a mailing list I host. 010f019064d51828-cebd1304-0d90-4bc4-9681-6c3133c15f62-000...@email.xnnd.com 010f0190649e24fd-3c217ff4-5c4b-4087-b2ec-4069ce5833da-000...@email.xnnd.com 010f01906482b197-52d7232d-a79d-496c-8c3f-888e873db34f-000...@email.xnnd.com 010f019060f84e64-8db83eef-8c80-4f0f-8b90-9560f9491cf9-000...@email.xnnd.com
Maybe the first nine digits are some sort of client identifier? I am not sure if it's just a counter, or an encoded client ID, or encoded recipient ID. Also, it's very, very easy to set a custom return-path subdomain in SES. Mine is customized, as you can see above. Thus you could take the stance that you'll block @amazonses.com and anybody who wants to get past that can configure their custom return-path domain. Is that wise or kind, I'm not prepared to judge. Just saying that it is something somebody could potentially choose to do, just like when people block *.exacttarget.com to reject mail from any Salesforce Marketing Cloud client that doesn't have a custom domain implemented. Cheers, Al Iverson On Sat, Jun 29, 2024 at 11:59 AM Slavko via mailop <mailop@mailop.org> wrote: > Hi all, > > please, is there some logic in AmazonSES sender? > > I (my user) recently start to get spams with envelope sender in form > (last item): > > > 01000190647ae455-a250a7c4-5c6b-4b0d-82a5-94f06382aa1f-000...@amazonses.com > > Mails has valid "amazonses.com" & "ionixdev.com" DKIM, they has > "@ionixdev.com" in MIME From, which has not SPF nor DMARC records. > I found near to zero public info about ionixdev.com domain... > > I don't expect to know who is sender, i want to know if their customers > has attached some form of ID, which can be used to identify, that it is > the same and reject it at RCPT stage. Is it possible? > > I checked multiple these senders and i fail to see pattern in it. I see the > same Feedback-ID: header value, but that is too late... > > thanks > > -- > Slavko > https://www.slavino.sk/ > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://list.mailop.org/listinfo/mailop > -- Al Iverson // 312-725-0130 // Chicago http://www.spamresource.com // Deliverability http://www.aliverson.com // All about me https://xnnd.com/calendar // Book my calendar
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