This notice means that Meta (WhatsApp) decided to block the delivery of a message, even though technically the API is working correctly.
In other words: it’s not an integration error, nor a system error. It’s a decision made by Meta itself. Datacrazy has no control over this and can’t do anything to change it.
Practically speaking, Meta usually blocks delivery for two main reasons:
If the contact was recently reached with similar messages (templates, campaigns, sales approaches), Meta may block new attempts.
This can happen when the user:
They chose to receive less of this type of content.
They ignore repeated messages
They block similar conversations
They interact negatively with commercial communications
These signals make Meta automatically protect the user.
These leads you’re sending, where did they come from?
Purchased list?
Ads (Meta Ads)?
Here the answer is straightforward (and honest):
If the company paid, for example, R$300 for a 10k lead list, what are the chances that:
Have another 5,000 buyers already blasted messages to this same list?
Or worse:
If it was very cheap, think of 20,000, 30,000 or 50,000 buyers using the same list.
Result?
The lead has already been hit several times
Rule #1 kicks in
Meta blocks the delivery
With bought lists, it’s common that:
Out of 1,000 leads
Only a few actually receive the message
Most of them come back with the warning: "Meta chose not to deliver"
In this case, the problem is not the platform, it’s not the connection, it’s not datacrazy, and it’s not a problem with Meta, but rather the origin of the list that made META activate protective measures for its users.
Here the block can happen, but it’s:
Less common
Not impossible
It usually happens when:
There’s an excess of blasts
Messages are very repetitive
Templates with low relevance
Even so, the block rate is usually way lower than with purchased lists.
Meta’s logic is simple:
Meta sells ads
The ones who create real value are the active users
WhatsApp is part of the same ecosystem
If there were no control:
WhatsApp would be saturated
Users would abandon the app
Facebook, Instagram, and Threads would lose attention
Fewer people would see ads
Less attention = fewer paid ads
Meta is forced to protect its user base.
Who brings the value of ad usage:
It’s the user browsing Meta’s apps
Who pays:
It's the advertiser
But the advertiser only pays if there's someone willing to receive it.
So, when you see the error:
"Meta chose not to deliver the message"
Most of the time, the answer is here: lead quality and source, not in the technology.
