Concurrent MX record lookup

We have an emaergancy email system that sends out alerts for differnt events. The company that send send the email is say that there is a 9 connection limit (They are sending from 3 differnt IP addresses). Does Cloudflare limit the number of Concurrent MX record lookup? If so what is that limit and is there a way to incress it? In case it is reavent the company that is sending the emails is Twilio SendGrid.

They do not.


That is what I needed to know.

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