I have a customer for Email Security cloud, He have Office 365 , one exchange server onpremise and one server smtp from where he send 22000 emails dialily.
i had had thinking take the ip public from the two servers onpremise into Email Security Cloud like relay servers , both use the same ip public to send the email currently, them last step its a barrucada server, but i dont sure if the amount emails could be filtering by Email security cloud ,i found this post and this say that only there is restriction by connection dont by number emails .
When sending bulk emails through the Email Security.Cloud product, the number of individual emails sent per SMTP connection is limited to 100.
(this is not the same as the number of recipients on a single email message)
If more than 100 emails need to be sent at once, it needs to be broken into separate SMTP connections. This can be done in some mail programs, especially ones built around managing distribution lists, or by using an outside bulk mailer service.
its say i can send one email to with 22000 recipients but i dont cant send 22000 correo with 4 recipients each one. ¿rigth?
Too the customer have 3 domains currently ,but they will add 3 more , there is some number max to Domain checks?, and i have to ask the customer if all them use the same MX register for the inbound email ¿rigth ?