Stu,
Your AC3 accepts mail? Usually an ISP will only block inbound smtp (port 25). They usually dont block outbound smtp.
This is done to prevent you from running a mail server at your house. If they blocked outbound smtp no mail would go out if you are using a mail client and the server you connect to uses smtp.
Maybe im confused at what you are trying to do as I dont have an AC3.
Gil
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