Hello @FLEOA ,
If you're sending to a larger list, then your email will go through a process known as staging. Besides staging, some email programs' security protocols may force emails to go through a quarantine period until the algorithms determine it's from a good source, authentication confirmed, or just to make sure the links and images don't contain anything malicious. If you have additional questions about staging, I'd advise speaking with the Delivery team directly.
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