I worked on an email system that sent billions of emails a month. We used these messages from providers to ensure we never sent them an email again to prevent hurting our reputation. (Marking an email as spam, is by itself, a very low signal on reputation, unless some massive % of recipients mark it as spam. Sending an email to someone who has already indicated you are sending them spam is a high signal that you’re sending spam, however).
It doesn’t even matter when you do it. We had people (outliers) who would go back and hit every single email we sent them for the last 6 years as spam, after a bad customer service interaction, not getting a refund, or whatever pissed them off. We actually investigated all outliers. Most people didn’t report spam on anything older than 6 months.
I worked on an email system that sent billions of emails a month. We used these messages from providers to ensure we never sent them an email again to prevent hurting our reputation. (Marking an email as spam, is by itself, a very low signal on reputation, unless some massive % of recipients mark it as spam. Sending an email to someone who has already indicated you are sending them spam is a high signal that you’re sending spam, however).
It doesn’t even matter when you do it. We had people (outliers) who would go back and hit every single email we sent them for the last 6 years as spam, after a bad customer service interaction, not getting a refund, or whatever pissed them off. We actually investigated all outliers. Most people didn’t report spam on anything older than 6 months.