Our Exchange Server with ActiveSync used by mobile clients has a 300 MB attachment limit.
We noticed that the Mail app on the latest iPhone removes attachments over a certain size (20 Mb??) before sending emails.
Other software (ex. AquaMail on Android) manages to send attachments up to 80 MB with the same email account.
We are 100% sure there are no iPhone specific smaller limits on the server side.
Does anyone know where to find the official maximum attachment size usable by the Mail app on iPhone?
I found this - https://support.apple.com/en-us/HT202305 - but that's specific to iCloud mail accounts