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1.
Descriptive noun for an email written all in capital letters (i.e., full-blown capslock) with optional poor grammar; may or may not actually be emotionally charged, but regardless one feels affronted when presented with such an email. A departing signature is also optional.
1. Did you see that screamail I got from my TA? I thought she was pissed off, but I guess she just doesn't know to turn off capslock.

e.g. HI U CAN JUS PUT THE DISADVANTAGES & ADVANTAGES NO NEED TO PUT ERROR FOR STANDARDS ONLY THE UNKNOWN. KTHXBYE.
by rikkuriffic January 29, 2009
 
2.
An email written in all capital letters signifying a loud angry voice.
this is an example of a SCREAMAIL

DEAR JANE DO,

WHY DON'T YOU UNDERSTAND THAT WHEN I SAY CALL THAT CLIENT I MEAN CALL THAT CLIENT???!!!

FROM BOSS MAN
by Gem Girl March 25, 2011