Should email-address be a fallback for salutation in e-mail, when there is no first name known?

So within the platform, first & last name is optional. When we send out emails with salutation, should we fallback to the e-mail address as a name (when first name = null) or should we just leave it empty?

Pro's

  • To some extent, it is a personal salutation
  • Confirmation that the e-mail is indeed aimed at you

Con's

  • Not really a human way of communicating
  • Sounds spammy, unsure if it influences the open rate for example.

Does anyone have any experience with this issue? And what were your findings? And am I missing something in terms of pro's/con's?

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