From address: Don't use an invalid domain name

Here's a common question that I get asked somewhat regularly: "I don't really want to receive or deal with replies to my email messages. Can't I just use a fake email address?" You should never, ever use a fake email address (or an email address with a fak…

Using AdBlock? Using Yahoo! Mail?

Not for long, you're not. Looks like Yahoo is testing code on Yahoo! Mail that would disallow AdBlock users from accessing their webmail platform. Read more over at the Consumerist .

Verizon Retiring Inactive Email Addresses

Oracle Marketing Cloud's Kevin Senne reports that Verizon is telling subscribers that verizon.net email addresses unaccessed for 180 days will be deleted. This is yet another reminder that you (senders) can't sit on email addresses for years and still expect them to be…

Gmail to flag unencrypted email connections

In November, Google indicated that they're working on a warning indicator to be shown inside of Gmail, indicating when an email message was transmitted over an unencrypted connection. What does it mean when an email message was sent without using an encrypted connection? I…

Use this ONE WEIRD TRICK when implementing a DMARC record

The one thing, the absolute most important thing to keep in mind when setting up a DMARC p=reject policy is: You have to know all of the sources of all legitimate, desired mail that uses your domain name, before you proceed. If you don't, here's what happens: You turn o…

Is my DKIM key Insecure?

Various folks have been asking lately if their DKIM key might be "insecure." At least one ISP out there is failing working keys with "verification failed; insecure key" as the error. A number of small, second or third tier ISPs note that the DKIM validation …