Foundational 6 min
How can legal firms protect their outgoing emails with SPF?
In the legal circles, even a single mark on your reputation can cause significant damage to your practice and your firm’s identity.
Knowledge Base
Blog
Expert guides on SPF, DKIM, DMARC, and email security.
Foundational 11 min
What Is An SPF Record And How Does It Protect Your Email Domain?
An SPF record is a DNS TXT record that tells receiving mail servers which IP addresses and servers are authorized to send email for a domain. Learn how SPF protects against email spoofing, the exact structure of a record, and how to verify one is published correctly.
Advanced 7 min
Optimizing SPF for startups using multiple email service providers
The growing technical stack, which includes transactional emails, marketing automation, and sales outreach tools.
Foundational 12 min
SPF Validation Tools: The Best Online Checkers for Your Domain
One of the top contenders in the field of SPF validation is MXToolbox. It stands out due to its intuitive interface and an array of diagnostic capabilities.
Advanced 5 min
AI Data Collection at Scale: Why Most Teams Choose Managed Proxy Services Over Servers
If you’re building AI systems that rely on large-scale data collection, chances are you’ve hit the proxy dilemma.
Foundational 13 min
SPF TXT Record Generator: Create Your Email Authentication Records Easily
Email communication has become a key part of our everyday lives, whether we’re connecting with friends, collaborating with coworkers.
Advanced 4 min
How do cybercriminals use neglected domains to evade SPF and DMARC protections?
Cybersecurity experts are lately highlighting the degree to which threat actors have gone in abusing security protocols.
Foundational 18 min
What Is SPF Email? A Guide to Sender Validation Technology
In our increasingly connected digital world, ensuring that your emails are genuine and trustworthy is more important than ever.
Foundational 14 min
IP Address Generator: Create Random IP Addresses for Free
In a digital landscape where every click can reveal your location or personal information, protecting your privacy is more important than ever.
Foundational 19 min
IP Lookup: Discover Your IP Address Location and Details
In today’s digital landscape, your IP address is more than just a line of numbers; it’s like a digital identity that reveals where you are and who you’re with.
Intermediate 5 min
The ‘unsubscribe’ button is a new security risk; consider a different approach
We are often told to simply ‘unsubscribe’ from newsletters, shopping emails, and similar lists, as it shrinks our digital footprint, prevents soft spam.
Intermediate 13 min
DKIM Authentication: A Complete Guide to Secure Email Deliverability
In the digital age, where nearly everyone relies on email for communication, ensuring your messages reach their intended recipients without being hijacked.
Intermediate 9 min
Common SPF Record errors (and how to fix them): Null values, multiple includes, and network solutions issues explained
The three most common SPF errors are multiple records on the same domain (PermError), null values from broken include chains (counted as void lookups), and Network Solutions DNS panels stripping quotes from TXT values. Each has a specific RFC-compliant fix.
Foundational 5 min
What does the ‘null’ value mean in an SPF record?
Imagine setting up an SPF record to protect your domain, only to realize it’s as good as not having one!
Intermediate 13 min
SPF for Subdomain: A Complete Guide to Configuration and Security
Each subdomain that sends email needs its own SPF TXT record - subdomains do NOT inherit SPF from the parent domain. Learn how to configure, test, and maintain SPF records for subdomains like mail.example.com, sales.example.com, and support.example.com.
Intermediate 5 min
How to safeguard your business against Vendor Email Compromise (VEC)?
Vendor Email Compromise (VEC) or financial supply chain compromise is a type of threat attack where cybercrooks spoof or impersonate the email account of a.
Advanced 14 min
SPF Compression: A Comprehensive Guide to Benefits and Techniques
SPF Compression and Its Role in Email SPF compression is more than just a technical buzzword; it’s an essential practice that enhances the functionality of.
Intermediate 5 min
The New Zealand government’s new DMARC requirements for email security
The New Zealand government recently published its Secure Government Email (SGE) framework.
Advanced 12 min
Multiple SPF Records: Essential Configuration for Email Authentication
Can You Have Multiple SPF Records? The crux of the matter is that you cannot have multiple SPF records for a single domain.
Intermediate 6 min
How often should you audit your SPF record, and what should you look for?
An SPF record is the primary authorization layer that determines whether your SPF configuration will be effective or let any domain send emails on your behalf.
Foundational 6 min
Understanding SPF mechanisms: a, mx, ip4, and include
SPF has 8 mechanisms defined in RFC 7208: all, include, a, mx, ptr, ip4, ip6, and exists. The four most common are ip4 (authorize a specific IP), a (authorize the domain's A record), mx (authorize the domain's MX records), and include (delegate to another SPF record). Learn the exact semantics and lookup cost of each.
Intermediate 13 min
Mimecast SPF: Setup Guide for Effective Email Protection
In a time where our inboxes overflow with messages, not all of them are as innocent as they seem.
Foundational 3 min
A simple explanation of DMARC compliance laws
"The most misunderstood thing about DMARC is that SPF passing is not enough - the domains have to align," says Brad Slavin, General Manager of DuoCircle.
Intermediate 5 min
Handling common SPF errors the right way
SPF is a sensitive email authentication protocol; it requires all details to be correct to produce accurate authentication results.
Intermediate 14 min
Proofpoint SPF Record: The Essential Email Security Configuration Guide
In a world where email is the primary mode of communication for businesses and individuals alike.
Foundational 12 min
How to Check SPF Record on MXToolbox for Email Validation
In the world of email communication, getting your messages to land in inboxes instead of spam folders is crucial.
Advanced 7 min
Invisible SPF failures: How misconfigured DNS entries are costing enterprises millions!
There’s a common misconception among domain owners when it comes to email authentication protocols - we have configured SPF, DKIM, and DMARC.
Intermediate 6 min
6 Best practices for maintaining an SPF record
Threat actors seek ways to impersonate credible companies and their representatives to send phishing emails on their behalf.
Intermediate 5 min
How to fix “550; 5.7.15 Access Denied” rejections?
Microsoft has always prioritized email security, and in pursuit of this goal, it mandated that all bulk senders properly authenticate their messages.
Intermediate 5 min
DMARC and anti-spam aren’t the same!
With around 3.4 billion spam emails sent daily, securing inboxes has become more challenging than ever.
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