Multiple Welcome Emails upon User Confirmation

[account]

Hello everyone,
I’m using the Newsletter plugin on my WordPress site and I’m having an issue with multiple Welcome emails being sent. When a user opens the confirmation link multiple times in quick succession (which is relatively easy to do), the Welcome email is sent again each time. This is particularly problematic because I send a personalized discount code in the Welcome email, and the user ends up receiving multiple codes that they shouldn’t actually get.
I’ve already taken the following steps:

The antiflood system is activated and set to one minute to prevent multiple sign-ups. Unfortunately, this doesn’t seem to work during the confirmation phase.
I’ve also activated debug mode, and it actually shows me multiple activations.

Is there a way to prevent the Welcome email from being sent when there are multiple confirmations? Or is there a hook or filter I can use to customize this behavior?
Thanks in advance for your support!
Best regards,

[Michael]

If you have “Repeated subscriptions” turned off, a block should be set after each subscriptions, but of course if the user clicks very rapidly on the same link, multiple subscriptions can be triggered. Based on our experience, this is fairly remote possibility, though.

Michael

[Author]

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