Is it an email / a letter / both?
both (letter or email)
Is it an email / a letter / both?
probably a letter - formality of style
Is it an email / a letter / both?
probably a letter - formality of style
Is it an email / a letter / both?
email - it says 'attached'
Is it an email / a letter / both?
an email
Is it an email / a letter / both?
both (letter or email)