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antispam International Yahoo Domains to get DMARC "Reject" Policy

You may recall that Yahoo initially implemented a "p=reject" DMARC policy back in April, 2014 for their primary yahoo.com domain name. (And AOL did the same for aol.com shortly after.) This changed the email landscape significantly. Now, nearly two years later, the email landscape is a different one. Yahoo implemented a "p=reject" DMARC policy for their ymail.com and rocketmail.com domains in November, 2015. Today, Yahoo announced on the DMARC-Discuss mailing list that they are implementing a [...] [more]
spamresource.com    Spam, Deliverability

discussion Masking WHOIS Information: No Abuse.net for you

The WHOIS process and protocol isn't just some nerd thing that goes back a hundred years; it's a valuable public directory for savvy internet users to be able to identify who owns a given domain name. Spam and security investigators find it a valuable tool -- even if sometimes bad guys submit bogus details, commonality of information across domains allows them to paint a clearer picture of who is behind a bad act or how broad that bad act may be. [...] [more]
spamresource.com    Deliverability

antispam DMARC: Please Be Careful!

Every couple of days, somebody new pops up on the DMARC-Discuss mailing list to ask some question or share an observation. It's great to see people interested and joining the conversation. Clearly, DMARC interest and adoption are growing. What's really frustrating, though, is that for about a quarter of the new subscribers, their first mailing list message goes to the spam folder in my Gmail account. It has become sort of an intelligence test I apply to new subscribers -- I've stopped digging those messages [more]
spamresource.com    Deliverability

discussion Whitelisting – A partial solution to Inbox Woes?

Things have become a little more tenuous in the email ecosystem of late. What was once a given, inbox placement is now hard fought. Way back in the year 2000, blacklists had so many false positives, inadvertently (and sometimes intentionally (vertently?)) blocking email from legitimate senders that the notion of whitelisting sprang up with the creation of Habeas.com. Habeas was based upon the concept that the presence of their trademarked headers, a haiku, [...] [more]
spamresource.com    Deliverability

tactics Address Validators: What are you Validating?

... Validation services (and spammers) moved to "faking it" via a series of SMTP commands. They walk through a sequence of MAIL FROM and RCPT TO commands (identifying who you might be trying to send a message to) without issuing a corresponding DATA command (meaning you never actually transmit a message to send). If the RCPT TO command fails, then it's a bad address. ... All good, right? Wrong. When you do this, ISPs notice. [more]
spamresource.com    Spam, Deliverability

antispam Al Iverson's Spam Resource: What does Spamhaus think of email append?

"Several IPs in this /28 are sending spam to spamtraps advertising the services of ADT Home Security. The IPs belong to InfoCanada, a division of InfoUSA, via their Yesmail ESP. InfoUSA also sells purchased and e-pended lists. We do not know whether the purchased list that the customer is using is using came from InfoUSA, but we consider the sales of purchased and e-pended lists to be spam support by definition. Use of such lists is a reliable path to an SBL listing." [more]
spamresource.com    Deliverability
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