"acceptance mail" is a correct and usable term in written English.
You can use it when referring to an email sent to confirm that someone has been accepted into something (such as a job or school program). Example: She received her acceptance mail, and was ecstatic to have been accepted at her top choice university.
To insure that its acceptances were accepted, Wesleyan employed gestures as large as a phone call from a department chairman, to jottings as small as "Come to Wes!" and "Yes!", which the dean of admissions, Nancy Hargrave Meislahn, scribbled on all 1,550 letters of acceptance mailed out in late March.
We unfortunately had an error that mailed out a single acceptance e-mail to every non-degree student who has ever applied through ApplyYourself here at GW.
When the rejection or acceptance e-mail arrives, sometimes on a single computer, the glory, disappointment, envy and guilt play out under the same roof, threatening the single most important relationship in their lives, beyond the one with their parents.
Please dis-regard the previous acceptance e-mail which was erroneously sent out.
Earlier today, an acceptance e-mail to an individual non-degree applicant was sent out accidently to 7,647 non-degree applicants.
In mid-December, acceptances were mailed to 7 out of 10 early decision candidates, a record number.
On a "fat-acceptance" e-mail list, several members suggested recent research will lead only to new ways for them to lose weight through genetic alteration, rather than be accepted as they are.
At some of the busiest offices, machines designed to facilitate the acceptance of registered mail have been introduced.
Instead of shock, there is what Senator Tom Harkin, Democrat of Iowa, called "a fatalistic acceptance" that tainted mail was simply apart of life in the post-9/11 world.
Also consider that he is always running a study on pesticides; writing scientific articles (in today's mail, acceptance letters for two); inveighing against human-made threats to wildlife; lumbering off to inoculate infested ducks, which cause swimmer's itch in local lakes; testifying in court; nursing wounded animals; and swabbing down his crematory.
