Know these Gmail SMTP error codes to fix email delivery issues for your company’s domain

Know these Gmail SMTP error codes to fix email delivery issues for your company’s domain

Know these Gmail SMTP error codes to fix email delivery issues for your company’s domain

by DuoCircle

 

Not all your emails pass authentication checks and other filters, thus returning with error codes. These codes help diagnose and understand issues that occurred during email transmission, letting you fix them and resend the message. For instance, it could indicate if the problem is due to incorrect credentials, a blocked email, or a temporary server issue. Some error codes indicate security-related issues, such as failed authentication attempts or detection of spam or phishing attempts.

(more…)

US bans the Kaspersky antivirus: Here’s what you need to know

US bans the Kaspersky antivirus: Here’s what you need to know

US bans the Kaspersky antivirus: Here’s what you need to know

by DuoCircle

 

You probably know by now that cybersecurity isn’t just about protecting your computers and data from threat actors, but it has broader implications that go as far as national security. Yes, it’s true! Case in point: the recent ban on Kaspersky antivirus software by the US government.

(more…)

LockBit Bank Data Deception, Snowblind Evades Detection, FBI Warns Crypto Scams – Cybersecurity News [June 24, 2024]

LockBit Bank Data Deception, Snowblind Evades Detection, FBI Warns Crypto Scams – Cybersecurity News [June 24, 2024]

LockBit Bank Data Deception, Snowblind Evades Detection, FBI Warns Crypto Scams – Cybersecurity News [June 24, 2024]

by DuoCircle

 

This week’s cybersecurity bulletin is packed with news that’s making headlines around the world! We’ve got reports on a failed scare tactic by the LockBit ransomware gang, a new and sneaky Android malware called Snowblind, the FBI warning about fake law firms targeting crypto scam victims, a supply chain attack that backdoored WordPress plugins, and Chinese cyberspies using ransomware as a diversion. Read more below!

(more…)

How to fix “Your DKIM signature is not valid” error

How to fix “Your DKIM signature is not valid” error

How to fix “Your DKIM signature is not valid” error

by DuoCircle

 

Email authentication protocols are the foundation of your email security strategy, and even the most seemingly insignificant error can mess up your deliverability and security. One such issue is an invalid DKIM signature, which means there are inaccuracies in your domain’s DomainKeys Identified Mail (DKIM) configuration.

(more…)

Configuring DKIM to sign mail from your Microsoft 365 domain

Configuring DKIM to sign mail from your Microsoft 365 domain

 

The main purpose of DKIM is to verify whether a malicious entity tampered with email content in transit. To ensure this, a pair of public and private keys are produced for your domain and used by the source email systems to digitally sign the headers of outgoing messages. This digital signature remains valid until intermediate email systems modify the signed part. The d= value represents the signing domain in the header field.

(more…)

How to fix the 550 5.7.26 unauthenticated sender error in Gmail?

How to fix the 550 5.7.26 unauthenticated sender error in Gmail?

How to fix the 550 5.7.26 unauthenticated sender error in Gmail?

by DuoCircle

 

Back in October 2023, Google released its revamped version of email-sending policies, which mandated bulk email senders to comply with the new authentication standards by February 2024. Cut to today: Google has now officially started rolling out these updated policies, and some organizations are receiving the following error message while sending emails:

(more…)

A Guide to Checking DMARC Compliance

A Guide to Checking DMARC Compliance

 

DMARC, or Domain-based Message Authentication, Reporting, and Conformance is one of the most important email authentication protocols that helps protect your email domains from phishing, spoofing, and other email-based cyber threats. Perhaps this is why it has now become a norm for organizations that send bulk emails to comply with.

(more…)

Kraken Flaw Heist, CDK Cyberattack Hits, AMD Investigates Breach – Cybersecurity News [June 17, 2024]

Kraken Flaw Heist, CDK Cyberattack Hits, AMD Investigates Breach – Cybersecurity News [June 17, 2024]

Kraken Flaw Heist, CDK Cyberattack Hits, AMD Investigates Breach – Cybersecurity News [June 17, 2024]

by DuoCircle

 

Don’t miss out on the latest cybersecurity scoop of the week! We’ll be covering the $3 million stolen from Kraken, the cyberattack that has affected thousands of US car dealerships, the AMD data leakage, fake Chrome errors installing malware on devices, and the cyberattack on the Toronto District School Board. 

(more…)

Learning to Use SPF Macros for Reduced Maintenance, Scalability, and Flexibility

Learning to Use SPF Macros for Reduced Maintenance, Scalability, and Flexibility

Learning to Use SPF Macros for Reduced Maintenance, Scalability, and Flexibility

by DuoCircle

 

Flexible and dynamic SPF records are easier to manage and need less frequent updates. Such records are even more significant for organizations with an extensive email ecosystem as they allow scalable SPF configurations.

(more…)

Pin It on Pinterest