Did you know Google ignores dots in your Gmail address username?
Sometimes you may receive a message sent to an address that looks like yours but has a different number or arrangement of periods. While we know it might be unnerving if you think someone else’s mail is being routed to your account, don’t worry: both of these addresses are yours.
I knew. Good thing I remembered when asked by a previous Plinky user about why he was still receiving weekly emails despite having deleted his account prior to Automattic‘s acquisition of the product. This was in fact the source of the issue.
Developers should also keep this in mind when programming a user and authentication system, as it can lead to support conundrums. This is also another example of why it’s always a great idea to go through an email validation step during your signup/activation process.