Anti-spam Archives

DKIM is a common email authentication method designed to reduce the opportunities for phishing attacks and email spam.

DKIM Oversigning to Help Avoid Replay Attacks

May. 9, 2022 / By Harold Vass

SparkPost Cloud now performs DKIM Oversigning by default to eliminate an attack vector for the billion+ emails our platform enables each day. DKIM (DomainKeys Identified Mail) is a common email authentication method designed to reduce the opportunities for phishing attacks and email spam. Combined with other common authentication mechanisms, the chances that your sending domains

Spamhaus’ Crackdown on Abusers

Oct. 4, 2019 / By Todd Herr

Read up on the new changes renowned blacklist operator Spamhaus recently announced to its DNSBL (a.k.a. blacklist) products.

Spam Traps: Break it Down

Aug. 16, 2019 / By Avi Goldman

Find and fix issues faster with our breakdown of spam traps now available as part of our Spam Trap Monitoring feature inside of SparkPost Signals.

What to Do When You’ve Been Listed on Spamhaus

Apr. 19, 2019 / By Kate Nowrouzi

Our SVP of Deliverability Strategy, Kate Nowrouzi, explains what you should do if you've been unfairly listed on Spamhaus.

Trick-or-Treat: 3 Ways to Tell You’re Being Phished via Email

Oct. 10, 2018 / By Sparky

When it comes to email there is nothing spookier than being phished. Learn about 3 clues that can help you identify a phishing attack.

4 Ways to Protect Your Email List from Spam Bot Abuse

Apr. 13, 2018 / By Hailey Orndorff

Our deliverability team shares four tactics to proactively protect your email recipient lists and sending reputation from spam bot abuse.

5 Things to Consider Regarding your Email List when Rebranding

Mar. 30, 2018 / By Christina Hoheisel

Some best practices to follow if you’re rebranding email due to an acquisition or general rebranding initiative to avoid confusing recipients.

mircosoft scl bcl blue background while sheet 360x274

Legitimate vs. Spam Messages: Breaking Down Microsoft’s Rating System

Jan. 26, 2018 / By Christina Hoheisel

Our deliverability expert breaks down what Microsoft's SCL, BCL, and PCL ratings mean when sending messages to one of their domains.

Troubleshooting Blacklisted IP Addresses

Mar. 29, 2017 / By Tonya Gordon

One of our deliverability experts weighs in on blacklisted IP addresses, good sending best practices and what actions to take if you suspect a blacklisting.

Blog Category

Anti-spam