Hi Evan, If your client's IP is getting blacklisted, then it's unlikely that the issue is spoofed spam. I haven't found anyone yet who can spoof an SMTP neighbor's IP address. If the IP's getting blacklisted usually it means that the IP is open for relay or that the client is a spammer or sending email for spammers.
Which blacklist was the client on? One of the public ones such as spamhaus or an ISP blacklist? What responses did their server receive from the recipients MTA? What's the IP of their server? A hosted spam solution may be right for the client, and with only 10 mailboxes it's not going to cost them much, but such services are primarily intended to block inbound spam/viruses and prevent viruses from being sent inadvertently. Sounds like an interesting issue. Give us some details and I'll see if I can help you out. -Chris -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Evan Mann Sent: Tuesday, April 08, 2008 11:57 AM To: Exchange Discussions Subject: Postini/MessageLabs/etc. Looking for some input on services such as Postini, MessageLabs, and others. I have a small business that is having some issues getting DNS blacklsited. The first time it was virus related, but that was solved, now it's due to spoofed spam. Looking for a service that will smarthost oundbound mail and hopefully eliminate the problems that the business is having now with their actual Ip that Exchange is hosted on being blacklisted. Also want the benefits of spam/av protection for inbound. There's about 10 mailboxes that need to be protected. _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/read/?forum=exchange To subscribe: http://e-newsletters.internet.com/discussionlists.html/ To unsubscribe send a blank email to [EMAIL PROTECTED] t.com Exchange List admin: [EMAIL PROTECTED] To unsubscribe via postal mail, please contact us at: Jupitermedia Corp. Attn: Discussion List Management 475 Park Avenue South New York, NY 10016 Please include the email address which you have been contacted with. _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/read/?forum=exchange To subscribe: http://e-newsletters.internet.com/discussionlists.html/ To unsubscribe send a blank email to [EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] To unsubscribe via postal mail, please contact us at: Jupitermedia Corp. Attn: Discussion List Management 475 Park Avenue South New York, NY 10016 Please include the email address which you have been contacted with.
