SHORT FORMS USED IN MAIL

SOW- Statements of work
RMA - Risk Management Association
RFO - Reason For Outage
MoM - Minutes of Meeting
PFA - Please Find the Attachment
FYI - For your information
FYA - For your attention 
EOD - End of the Day
ETA - Estimated Time of Arrival
FE - Feild Engineer
RCA - Root Cause Analysis
ETR - Expected time of return
HA - High Availability
SLA - Service Level Agreement