Once upon a time somebody - somewhere - somehow decided that it would be good idea to send email to their mailing lists using an email address in their "From:" field that didn't really exist. But sending email "from" an email address that doesn't really exist is a spectacularly bad idea. In fact, it may even qualify as the Epic Fail of "from" email address ideas.
Most legitimate mail senders know to process bounce messages. This means that if they get what is called a "hard bounce" for an email address on their list (meaning that the bounce tells them that the email address simply doesn't exist), they remove the email address from their list permanently. But more and more ISPs are inserting the bounce message right into your mail log, right at the time of the SMTP transaction, instead. If you don't check your mail logs regularly, you'll never see the bounce.
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Just mention the term 'DNS', and many email senders' eyes glaze over; say "rDNS" and a look of panic may replace the glaze. Yet, not only are these not complicated concepts, but having rDNS set up is critical to having consistent, good email delivery. Use our free rDNS check tool to confirm whether you have rDNS set up correctly.
Yesterday we talked about why you should give each of your customers their own IP address. But for various reasons, not everybody can do that - at least not right away - and so, as promised, today we are going to talk about segregating your outbound mail across different IP addresses based on opt-in quality.
DKIM (DomainKeys Identified Mail) is an important authentication mechanism to help protect both email receivers and email senders from forged and phishing email. Here's how to set up and use DKIM.
Hopefully by now you have read our article about what the big Yahoo DMARC p=reject rejection means for you and your email. And you may or may not be aware that yesterday AOL did the exact same thing, also publishing a DMARC policy of p=reject, which means, essentially, "reject any email coming from a yahoo.com or aol.com address if it was not sent through a Yahoo or AOL mail server."
If you are a business or commercial email sender, you can't help but have heard about the big issue with Yahoo that unfolded over this past week, having to do with Yahoo, DMARC, "p=reject", and Yahoo's rejection and bouncing of billions of pieces of email. But what does it mean for you, the commercial email sender?
SPF and DKIM are important resources to help secure different aspects of the mail flow. One of the problems left unsolved by SPF and DKIM, however, was the specification of the actions that needed to be taken at the receiving site based on the information conveyed by these protocols. Enter DMARC.
One of the first things that a responsible ESP must deal with, before starting to mail on behalf of their customers, is Reverse DNS (rDNS from now on). This is true for businesses that send out their own email, as well. This is our tutorial on how to set up rDNS.
A lot of business email senders are wondering just what Gmail's new "tabs" feature, now turned on by default for all Gmail users, means for delivery of the commercial email that they send. Will marketing email now go by default into the 'Promotions' tab, where Gmail users will probably rarely look? Will email go to the promotions folder instead of the spam folder? Just what will be the effect of Gmail tabs for email senders?
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