I usually use "my_gmail_username"+service_name@gmail.com to subscribe. If they start spamming me then I redirect all the email coming to "my_gmail_username"+ser

I usually use "my_gmail_username"+service_name@gmail.com to subscribe. If they start spamming me then I redirect all the email coming to "my_gmail_username"+service_name@gmail.com to my trash. Email sent to "my_gmail_username"+service_name@gmail.com is delivered to "my_gmail_username"@gmail.com, Anything after + is ignored by gmail for email delivery.