How can marketing mistakes cause deliverability crises?

Marketing-caused deliverability crises:

Common marketing mistakes:

Uploading wrong list file

Sending to purchased or rented lists

Dramatically increasing frequency

Ignoring unsubscribe requests

Deceptive subject lines

Crisis mechanisms:

Complaints spike from unwanted mail

Spam traps hit from bad lists

Engagement craters from wrong audience

Blocklist listings triggered

Speed of damage:

Single campaign can cause crisis

Reputation damage is immediate

Recovery takes weeks

Prevention:

Approval workflows for campaigns

List verification before upload

Volume limits and alerts

One cargo shipment of contraband can get the entire fleet banned.