Hey

Hey is an email provider offered by the software company Basecamp, headquartered in Illinois. It's a paid service for both hey.com recipients and those with their own domain hosting email in the Hey app. Hey boasts especially strict spam filtering and a manual screening process per sender. There's little a sender can do to troubleshoot delivery, as the individual recipient decides which email addresses they accept mail from.

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550All 550 codes →

smtp;550 5.1.1 <example@hey.com>: Recipient address rejected: User unknown

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