[wp-trac] [WordPress Trac] #52976: user emails comparison should be case insensitive

[WordPress Trac]

#52976: user emails comparison should be case insensitive
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 Reporter:  asaifm                               |       Owner:  (none)
     Type:  defect (bug)                         |      Status:  new
 Priority:  normal                               |   Milestone:  Awaiting
                                                 |  Review
Component:  Users                                |     Version:  4.3
 Severity:  normal                               |  Resolution:
 Keywords:  good-first-bug has-patch needs-      |     Focuses:
  testing                                        |
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Comment (by showravhasan):

 I reviewed [https://github.com/WordPress/wordpress-develop/pull/9196 PR
 #9196] and the approach using strcasecmp() for case-insensitive email
 comparisons looks correct. This aligns with how other parts of WordPress
 Core already handle email comparisons (as noted in comment 4 by @dd32).

 The fix properly addresses the issue where users receive unnecessary
 "email changed" notifications when only the letter casing differs (e.g.,
 User at Example.com vs user at example.com).

 While RFC 5321 technically allows case-sensitive local parts, virtually
 all mail servers treat emails as case-insensitive. This change improves
 user experience without breaking compatibility.

 +1 for committing this patch. The PR has been open for 7 months and would
 benefit from a review from a committer.

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Ticket URL: <https://core.trac.wordpress.org/ticket/52976#comment:11>
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