Emails Blocked Through Cloudflare

[Frank]

My site uses Cloudflare and I get blocked when sending an email with an attachment when using BB Inbox

This is the message

Why have I been blocked?
This website is using a security service to protect itself from online attacks. The action you just performed triggered the security solution. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data.

[Anonymous]

Hi @frankwarwick, I hope it should depend upon your specific Cloudflare security settings.
I have cross tested with Cloudflare setting with max post size limit 100mb ( obviously no one is going to send 100mb attachment ).

Regards