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Does outbound mail have a rate limit?

When I send outbound messages, is there a limit to the rate at which I can send?

There is an internal limit on the rate of outbound messages, but it is generally imperceptible. If a sender address sends more than 25 messages in a 10 minute period, there is a 1 minute delay for roughly every 100 messages in that same rolling 10 minute period. This short delay may be perceptible if you are sending out a mailing list, and this controlled flow should help with delivery success.


Last updated September 22, 2021

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