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Sending email to a VarAC user
What format does an email sent from the Internet have to use, or what is the minimum meta data it needs to contain, to be able to send an email to a VarAC user via a specific VarAC email gateway? Alternatively, is it possible to send an email from the Internet to a VarAC user without knowing which VarAC email gateway to use? In the above, I am assuming I know one or more email gateway to which the user will have access. The above process may be needed when you have never received an email via VarAC from that user.

No specific format or metadata. When you select the vmail button and then click the email option in the dialog box, you are presented with standard email parameters. The recipient need not even be a ham. It can go to anyone with email. But you will need to connect to an email gateway ham who will in turn send the email in the regular/internet way. Why not send it yourself that way? Perhaps its because you are in an area that has experienced storm damage and the internet is not available. So send it to another ham who has internet and their station will automatically send it for you. Good luck. 73