Jeremy Felt f12a68e7c6 Differentiate between invalid and missing admin emails when adding a new site
Check the emptiness of the admin email before using `sanitize_email()` and `is_email()` to determine if the address is valid.

Fixes #17890


git-svn-id: https://develop.svn.wordpress.org/trunk@29877 602fd350-edb4-49c9-b593-d223f7449a82
2014-10-12 00:21:02 +00:00
2014-08-21 02:53:16 +00:00
2014-10-07 15:27:56 +00:00
2014-09-05 19:44:38 +00:00
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