Archive for the ‘Network Security’ Category

Blocking Port 25 to Reduce Spam and Protect Your Network

Thursday, February 28th, 2008

If you have an email filtering service provider like Sentinare Messaging Solutions, Inc., then all your SMTP traffic should be coming from only the filtering provider and the filtering provider only. Therefore, you don't have to allow direct port 25 (SMTP traffic) to your email server any more and you ...

Why Not Use “mail.yourdomain.com” as the Name for Your Mail Server

Tuesday, February 26th, 2008

Spammers will ignore MX records sometimes and use "mail.somedomainname.com" to relay spam to. If you have an off-site email filtering service provider and you set all your MX records to their server, all your mail should go to the off-site email filtering provider's servers, according to the MX records, but ...

Multiple Layers of Defense for Email

Monday, January 14th, 2008

Relying on just one form of protection (one layer of defense) for a given service is less safe than having more than one layer of defense protecting that service. For example, there is an often repeated analogy for security plans that rely only on firewalls: This is the cookie that ...

The Non-Tangible Benefits of Email Filtering

Wednesday, January 9th, 2008

The most tangible benefit to an off-site email filtering proxy service like Sentinare PostGuard is that users stop getting spam and viruses in their inbox-- and your users will be very happy about that-- but that is only 50% of the true benefit to using filtering service. By using ...

Security Experts List Email Filtering in 7 Security Tips

Thursday, December 27th, 2007

In an article titled "Seven surefire strategies to block network attacks", Canadian security experts list email filtering as one of the most important security practices. There are two benefits to using a provider like Sentinare Messaging Solutions. Blocking spam and viruses: This is the most obvious benefit. Your users immediately will notice ...