The computer service is the connecting link between your computer and your addressee. You need to be on the same service as your addressee, otherwise that service cannot send your message. Therefore, make sure that your addressee is on your service.
If your addressee is not on your service, then your computer service is not the right computer service for that message.
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“The Source” is an information service of “Source Telecomputing Corporation.” 800-336-3366.
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“CompuServe” is an information service of “Information Services.”
800-848-8199 (in Ohio 800-457-0802).
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“Genie” is an information service of “General Electric Information Services.” 800-638-9636.
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“ABA/Net” is an informaiton service of the American Bar Association.