Can I send an envelope to multiple recipients with the same email address?

Yes.

The same email address can be used for multiple recipients in an envelope as long as each recipient has a different name. This is useful for circumstances where both recipients use the same email address such as a small office settings or couples who are married.
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An email will be sent to each recipient who uses the same email address, with each email addressed to the respective recipient's name. This ensures that recipients can easily identify which email is intended for them.