attachment
I have attached my resume with this email---does it sound natural when you write an email to someone.
Is it I have attached my resume or I'm attaching my resume TO or WITH this email?

Question

attachment
I have attached my resume with this email---does it sound natural when you write an email to someone. 
Is it I have attached my resume or I'm attaching my resume TO or WITH this email?

Answer

I would use "I have attached..."  And "attached TO" sounds more natural.

Also, this thread may be useful:
https://www.italki.com/question/413662

Answer

The most common way to say this is "I am attaching my resume to this e-mail".

Answer

It's understood so you don't need either :)