How many emails can PHP send at one time?

Question

I have over 4,000 users who have signed up for weekly email updates. To send an email, I just use:

mail($to,$subject,$message,$headers);

Which works great. My question is: how many letters can you send at once ? Can I send all 4000 at once by going through an array of letters inside a loop? Or will it cause a situation timeout, only part of the list will receive emails?

Answer 1

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