First off thank you for taking the time out to assist me w/ this issue....
One of my clients is unable to sent message to one of his clients. The client can send messages to him but not the other way around. From anywhere else it works fine, but not form the office network.
MS Server 2003 sbs sp2
Exchange Version: 6.5.7638.1
ISP: Cable Business Class
Watch Guard Firebox (hardware firewall)
The error message he gets back is: "<mta3.srv.hcvlny.xx.net (tcp-daemon) #5.0.0 smtp; 554 service unavailable; Client host [mta3.srv.hcvlny.xx.net] blocked using barracuda reputation;
The link takes me to:
Sorry, your email was blocked
We are sorry you have reached this page because an email was blocked based on its originating IP address having a "poor" reputation. The "poor" reputation may have been caused by one of the following reasons:
* Your email server contains a virus and has been sending out spam.
* Your email server may be misconfigured.
* Your PC may be infected with a virus or botnet software program.
* Someone in your organization may have a PC infected with a virus or botnet program.
* You may be utilizing a dynamic IP address which was previously utilized by a known spammer.
* Your marketing department may be sending out bulk emails that do not comply with the CAN-SPAM Act.
* You may have an insecure wireless network which is allowing unknown users to use your network to send spam.
* In some rare cases, your recipient's Barracuda Spam Firewall may be misconfigured.
Barracuda Networks is not attempting to block your individual emails in particular. The reputation system uses automated algorithms for determining its results -- very similar to the anti-fraud mechanisms used for credit cards.
Does this mean that my clients server has spam/virus. (un likely since we run Vipre Enterprise and i check logs and quarantine often)
Or does this mean that the person my client is sending the email to is infected? If so, why would emails coming from him get through??
Thank you for you expertise...