Spamming user+1@gmail, user+2@gmail takes absolutely no technical knowledge whatsoever - anyone can do it with 1 gmail account.
Spamming user1@domain, user2@domain etc requires 1 of two things:
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you can sign up for multiple email accounts using a third party service. You’re going to run into trouble with Gmail or other big providers if you start creating accounts en masse.
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you create your own email server. this requires someone with selfhosting knowledge and some basic coding (or rather server config) experience.
alphafalcon@feddit.de 6 months ago
IF you already have an email domain you control.
Calling “acquiring and setting up an email domain and configuring the mail server for wildcards” “basically no extra effort” is a bit disingenuous compared to “solve a captcha for a Gmail account”