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The meaning of the Acronym 550 is...
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Internet
HTTP Error Codes
550
550 is
Mailbox Unavailable
550 is also in:
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Acronym Definition Searched:
SDL
CC
DEC
ZTC
ESK
OPS
IDSL
FOS
LOLEST
TOX
IRA
56120
WVTX-ADG
AAA
RTCA
