Operations Lead
Vasile Diaconu is the Operations Lead at DuoCircle, the company behind AutoSPF. He coordinates between engineering, product, and technical support — running project management, interfacing with developers on customer-reported issues, and making sure work that comes in through the support channel actually gets closed out. Vasile sits at the intersection of customer feedback and engineering execution, which gives him a direct view of which SPF problems customers hit most often in production and how they get resolved operationally.
A side-by-side comparison of the 8 best free SPF record checker tools in 2026 — AutoSPF, MxToolbox, dmarcian, EasyDMARC, DMARCLY, PowerDMARC, Mailtrap, and DNS Checker. Each tool tested against the same domain with real results.
HIPAA compliance means protecting sensitive patient data, also called protected health information or PHI. This includes names, medical records, insurance
In 2026, the best practices for secure SPF lookups are to keep SPF within the 10-DNS-lookup limit by optimizing and (selectively) flattening includes, pref
Most guides treat DMARC deployment as a two-step process: publishing the DNS record and monitoring its performance. But this is only the starting point and
Email authentication is no longer a “set it once and forget it” task. In 2026, mailbox providers are applying stricter filtering rules, and even small SPF
Google’s SPF checker most often reports “no SPF record” when the domain publishes only the deprecated SPF resource record (not a TXT), when DNS propagation
Emails are typically rejected for SPF after a DNS change because receiving servers still reference cached/propagating DNS data, the new SPF record has synt
You need an SMTP relay provider if your sending volume, deliverability risk, compliance burden, or operational complexity exceeds what you can reliably man
The most common issues highlighted in an SPF record breakdown are syntax and qualifier mistakes (missing v=spf1, multiple records, malformed mechanisms), e
You should use an SPF validator before making DNS changes because it catches syntax and policy errors, simulates the impact of proposed TXT records, enforc
Reaching decision-makers has never been harder. CEOs delete generic emails without reading. Business owners ignore LinkedIn messages from strangers. Top ma
Google's 2024 bulk sender guidelines require every domain sending 5,000+ daily messages to Gmail to authenticate with SPF, DKIM, and DMARC. Learn exactly what to fix, when enforcement kicks in, and how to test compliance.
For almost all major businesses today, email is the primary means of communication. It is through email that these organizations exchange even the most cri
Every year, cybersecurity enthusiasts celebrate October as the month of awareness. It is the time when we remind ourselves that digital safety is not limit
Understanding SPF Records: A Basic Overview The Sender Policy Framework (SPF) is a fundamental component of email authentication designed to prevent email
Understanding the Importance of Email Security for Businesses In today’s digital landscape, email remains a crucial communication channel for businesses ac
For quite a few years, malware like ransomware, phishing, Denial-of-Service (DoS/DDoS) attacks, and Man-in-the-Middle (MitM) attacks were among the top cyb
Understanding the Basics of SPF (Sender Policy Framework) The Sender Policy Framework (SPF) is a crucial email authentication protocol designed to protect
Imagine setting up an SPF record to protect your domain, only to realize it’s as good as not having one! Well, this is precisely what the situation is when
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
DMARC is no longer just a best practice; it is now a requirement. Now, regulatory bodies across the world mandate the implementation of SPF, DKIM, and DMAR
Sender Policy Framework (SPF) is an email authentication protocol designed to prevent email spoofing — a common tactic in spam and phishing attacks. In tod
The healthcare industry depends a lot on technology — whether it’s online appointments, digital health records, or connected medical devices. While this re
In general, cyber resilience is a company’s ability to withstand, respond to, and recover from cyberattacks or IT failures while continuing to operate smoo
GDPR (General Data Protection Regulation) is the European compliance that came into effect in 2018. It aims to protect the personal data of European reside
Creating an SPF record is a one-time job, but you have to keep updating it with new senders. In an SPF record, the term ‘sender’ refers to the IP addresses
Be it corporate entities or business enterprises, emails tend to be one of the strongest modes of communication for conveying professional messages. Howeve
A famous software firm, Egress, published its Phishing Threat Trends Report in October 2024, highlighting how impersonation became the most prolific phishi
The ever-evolving digital landscape is bringing both solace and trouble to people. Cyber advancement has made both our professional and personal lives easy
We are more than halfway down in 2024, and the number of AI-based scams is not looking like it’s in the mood for dwindling anytime soon. Since the launch o
SPF or Sender Policy Framework is the first line of defense between your email ecosystem and email-based cyberattacks. It ensures that only authorized mail
It was not long ago when Google and Yahoo revamped their email-sending policies and made DMARC authentication a mandatory exercise for organizations sendin
Here’s a harsh truth- your customers’ card transactions are not as secure as you might think. Even though card payments have opened up new avenues in the b
Sender Policy Framework is an email authentication protocol that allows a domain owner to publish an SPF record corresponding to their name. This SPF recor
With email communication reigning in the digital world, email-based attacks are at an all-time high! Gauging the magnitude and the far-reaching impact of t
An SPF record checker is a diagnostic tool that checks your SPF record to ensure it’s valid and free of syntactical and configurational errors. Let’s see h