Technically, yes. However, the term “e-mail” is always correct, since it modifies the word ‘mail’ by designating its type, in this case ‘electronic’.
When I see people use “email”, and I see them in person, I’ll tell them I got their ‘email’ in one phrase. They then ask why I’m mispronouncing the word, and I teach them about modifiers.
As another example, in the 1940s, troops listened to music on ‘V-discs’. Today, I guess they’d be ‘vdiscs’.
I find that sad.
I’m 56 and have never heard of either v-disks or vdisks, until now. The history lesson is appreciated. If its (their) etymology derives from the 40s, I would have thought the reference Roswell-related. In any event, collapsing a modifier into the modified noun is hardly noteworthy in either a linguistic or historical sense.
Must remember that.