Newbie here! But with plenty of E-Mail background. I think that this is a very valid point. The SMTP Proxy should not let you receive mail 1) if it is a MEGA message you will clog up your bandwidth (No thanks!) and 2) you run the risk of getting listed your server in the Real-Time Blackhole list if you act as an open relay and 3) When the guvnor gets to hear that you are an open relay, he starts to question security everywhere else.
Having said that... Any decent mail server (We use MDaemon Pro V3) ought to have Spam, IP Verification and Relay Protection built in! Kevin ---------- From: Michael W. Burden[SMTP:[EMAIL PROTECTED]] Sent: 14 August 2000 13:33 To: [EMAIL PROTECTED] Subject: Testing your SMTP Proxy to make sure that it rejects spam relays --------------------- Attention ----------------------------- Online GNAT Box User Forum is Now Open Click the Register link and sign up today http://www.gnatbox.com/cgi-bin/Ultimate.cgi ------------------------------------------------------------- Send postings to: [EMAIL PROTECTED] Access the list archives at: http://www.gnatbox.com/gb-users/ ------------------------------------------------------------- Here's a quick "how to" for anyone who has configured the GNAT Box email proxy to only accept mail addressed to your domain(s) [Authorization -> Email Proxy -> Domain(s) to Accept], and want to verify that the SMTP proxy is, in fact, rejecting spam relaying. Telnet into your SMTP server and entering the following exchange. You may need to turn on local echo in your telnet session to see what you are typing. The responses that you will get from the GNAT Box SMTP Proxy are shown in parenthesis. The "501 Invalid domain" is the important one. If you get "250 OK" at this point, then your GNAT Box is not correctly configured to block an attempt to relay spam. Replace mail.yourdomain.com with the correct name or IP address of your mail server. The other domains and addresses may be used as shown below. The gist of what we are doing is logging into an SMTP session and attempting to send email to [EMAIL PROTECTED], which (hopefully) isn't in the domain that the GNAT Box has been configured to accept email for. telnet mail.yourdomain.com 25 (220 SMTP ready) HELO somedomain.com (250 OK) MAIL FROM: [EMAIL PROTECTED] (250 OK) RCPT TO: [EMAIL PROTECTED] (501 Invalid domain) quit Mike Burden Lynk Systems (616)532-4985 [EMAIL PROTECTED] ---------------------------------------------- To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe gb-users your_email_address in the body of the message * * Disclaimer * * The content of this E-Mail is sent to the addressee only and may contain information that is confidential. Persons other than the addressee should not read, disclose, copy or otherwise distribute this message except for delivery to the addressee. This E-Mail and its attachments (if any) have been scanned by Norton Antivirus, but you should satisfy yourself any files are virus-free before use.
