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Mar 7, 2024
Views: 233

Troubleshooting Emails when sending messages to Gmail

Hong Gu Yoon

When running an email server, it is very important to make sure your server is properly configured. Failure to do so will result in your IP address being blacklisted, which can result in email delivery failures. If you are having issues sending outbound e ...

Feb 15, 2024
Views: 175

What makes a good spam filter solution?

Hong Gu Yoon

Emails, especially for small businesses and large companies, are an important key for communication. With the increasing amount of emails being sent and received every day, the abundance of spam messages has become a huge problem. Spam interferes with com ...

Jan 8, 2024
Views: 3580

The Importance of a PTR Record

Hong Gu Yoon

SMTP, or Simple Mail Transfer Protocol, is a protocol used for sending and relaying messages over networks. SMTP defines rules and conventions for how email messages should be transferred and submitted. When implementing an in-house-SMTP server, so ...

Nov 13, 2023
Views: 314

How to prevent large PST files in Exchange

Hong Gu Yoon

It's important for companies to make sure email messages are flowing in and out smoothly. The greater the amount of emails received in your email server, the greater the disk space will be used. In Exchange, users' mailboxes are saved in a PST file. These ...

Jan 18, 2021
Views: 3519

Alternative to SpamAssassin

Hong Gu Yoon

Alternative to SpamAssassin SpamAssassin is a free and open source spam filtering solution. It helps block many emails by using a scoring system. When an email comes in, SpamAssassin uses rules to see if the filter matches. The total score will det ...

Nov 29, 2020
Views: 3976

Alternative to Postfix

Hong Gu Yoon

When it comes to email servers, there are benefits to hosting a in-house email server. These advantages include having full control of your server as well as having privacy where no third party will have access to your emails. There are numerous in-ho ...

Oct 8, 2020
Views: 2816

How to be HIPAA Compliant with Emails

Hong Gu Yoon

HIPAA and Emails Working in the medical field requires you to be in constant, quick contact with not you’re your colleagues but patients as well. Emails are quick, efficient, and accessible to everyone. However, while sending both personal and priv ...

Sep 14, 2020
Views: 3832

How to Monitor Secure Logins

Hong Gu Yoon

As an administrator, it's crucial for all of your users to make sure they are connected securely. Data being compromised is no joke; sensitive information such as credit card, social security, tax return numbers and even passwords are exchanged throug ...

Jun 29, 2018
Views: 459781

Introducing SynRBL

Hong Gu Yoon

There are many methods of catching spam emails. Some of these methods include; content filters which inspect the message content to determine if a message is junk or not, Bayesian filters that calculate the probability of a message being spam based o ...

May 18, 2016
Views: 160851

What is a Reverse NDR Attack

Hong Gu Yoon

The non-delivery report (NDR) is generated when an email message is not able to be sent to the next hop. Spammers can use NDR as a method to generate spam towards victims by using the victim's email address as the sender. This is called a reverse NDR ...

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