I will check my MailScanner.conf but I think it set to junk all email containing and IMG tag. You defienitely *can* configoure MailScanner this way.
You are liable to find my squid.conf file reckons didtheyreadit.com is beyond the pale and refuses to process any requests doe things on that site. If they try to bypass the squid proxy, then I have news for them: any requets to port 80 or 443 from anywhere else does is blocked by the (default deny) firewall.
The *default* settings in many email clients is not to download images, and I think the clients that this applies to include eudora, outlook express and outlook.
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