"this email contains" is a perfectly correct and usable phrase in written English. You can use it when you want to let the reader know what information the email that you are writing or sending has in it. For example, you could write: "This email contains important information about the upcoming meeting.".
Unfortunately this email contains very bad news.
This email contains his correspondence with Facebook.
Pharo had replied to the email containing the edict, by saying this would "dramatically increase my workload".
Doyle said the information in the email contained valuable information police could have acted on.
The suggestion was that the email contained voicemails transcribed by a junior reporter for Mr Thurlbeck.
Open the email containing the attachment.
"If every email contains the word 'plot' or 'facility,'" Grosser writes, "then searching for those words becomes a fruitless exercise.
When I feel like I can't trust my brain 100%, Ludwig really comes in handy. It makes me translate and proofread faster and my output more reliable.
Claudia Letizia
Head Translator and Proofreader @ organictranslations.eu