error 451 too many emails

Please note the error message that you see 451-Too many messages from this user. Please wait for a while and try again, 451 or have the limit increased. means that specific outgoing user has reached the outgoing connections limit, so this limit needs to be increased for it. This can be done under Outgoing – Manage users – go to the specific outgoing user – Edit and increase the connection limits set for day/week/month.

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