Tag: mail
ClearPass – mail validation
If you would like to restrict or validate mail addresses during guest registration, you can use simply restrict domains. An example of a mail validation for the provided user and sponsor mail address is. user mail validation (the mail address should not be a company mail address) array ( ‘deny’ => array ( 0 => … Read More
Anti-virus / Anti-SPAM, Configuration Example, Proxy
TrendMicro IMSVA – reject unknown recipients via LDAP
With the configuration and implementation of an anti-virus, anti-spam solution, I always check if the security appliance has the option to block unknown recipients via LDAP. This prevents unnecessary e-mail from being sent to the backend servers. While configuring a TrendMicro IMSVA 8.0 I noticed that the LDAP option was available, as shown below. The … Read More
RSA 7.1 with On-Demand
RSA token security provides a way to strengthen the security on public services. Token authentication is most often implemented with hardware tokens. RSA 7.1 has additional methods of token authentication besides the hardware tokens: Token delivery by SMS; Token delivery by e-mail; To enable the above features you have to install at least RSA 7.1 … Read More
Barracuda – Mail Protocol Violation
A customer updated the firmware from a Barracuda SPAM &Virus 300 firewall. The firmware was upgraded from version 3.4 to version 3.5.12.024. After the upgrade no email was coming in or going out through the Barracuda firewall. All email was blocked and the following reason was visible in the message log: Mail Protocol Violation At … Read More
relays.ordb.org
Since the day before yesterday, some of our customers complained having problems with receiving e-mail. The senders from the e-mail noticed that their mail had been blocked by relays.ordb.org. This RBL is offline, according to this article, at least everybody thought. Seems to me, the RBL came online yesterday and blocked everything. I have heard … Read More