View daniel.toma Profile
UserName: daniel.toma Contact this user
Articles posted by daniel.toma

Spam countermeasures and blocking mechanisms

In today's Internet environment, the spam issue cannot be eliminated 100%. It is a new problem, for which no conventional solutions have yet been designed. To address this increasing issue, many solutions for the stages before and after accepting mail...

Spammer tactics of circumventing filtering

This article will focus on the tactics used by spammers to successfully deliver a mail message to the mailboxes on your server, despite any implemented sorting or blocking filters.

Large scale message handling infrastructure design

In this article, we will describe some of the most important things that need to be taken into account when designing a large scale messaging setup. We are referring to large scale setups, not cluster setups; the main difference being that cluster...

Spam overview and spam types

Just as the title implies, this article will focus on SPAM messages, on the "know your enemy" principle. We will first describe the different types of spam, to then move to analyzing the issue in perspective, and in detail. The purpose of...

Tracking and detecting valid mailboxes through HTML emails

Back in the days when Windows 98 was the latest Microsoft operating system, HTML email messages accounted for a large number of infected Windows-based systems. Surprisingly, things have not changed much nowadays either. Accepting and displaying HTML...

Legitimate sites serving up stealthy attacks

Thousands of legitimate Web sites are hosting an infection kit that evades detection by attempting to compromise each visitor only once and using a different file name each time, Web security firm Finjan warned on Monday. The attack, dubbed the...
Already a member?
Blacklist monitoring alerts
sign up Signup for our real-time monitoring service and receive email notifications each time one of your IPs gets blacklisted.
Free Signup
Mail Server Operating System Poll

What OS do you use for your email server?
disabled next

How many mailboxes do you currently manage?
previous next

Would you like to comment upon the choosing of this particular OS?

DNS Tools
Get IP status, owner and location, obtain its corresponding hostname or check specific ports.
Ping Statistics
Reverse DNS Lookup
Whois Info (IP owner)
GeoIP Information
Check Port
Open Relay Test
Test if your mail server is an open relay for spammers.
Blacklist Checker
Check if your IP is listed in DNS based email blacklists (DNSBL)