Sending stopped by the provider.
WHY IT HAPPENS
A complaint rate above their threshold A high bounce rate, indicating a poor list Importing a list without evidence of consent Content that violates their terms A sudden volume increase from a new account
WHAT TO DO
Read the notice. It states the reason.
Respond honestly. Explain how the list was built and what you send.
WHAT THEY WILL WANT TO KNOW
Where the addresses came from Whether you used double opt-in What the campaign contained What you will change
IF YOU IMPORTED A LIST
Be honest. Attempting to conceal it is worse than explaining it.
They may require re-confirmation of the list, which is reasonable.
WHAT NOT TO DO
Open a second account and continue. Platforms detect this and it ends the relationship permanently.
PREVENTING IT
Double opt-in Removing hard bounces Keeping complaints near zero Growing volume gradually
THE UNDERLYING POINT
Platforms protect their own sending reputation. An account damaging it affects every other customer.
