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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:
HTTP Error Codes
Acronym Definition Searched:
WAPP
FORU
LLC
SLAC
CFI
GBYF
91602
WGRP
WRAP
HPAA
54563
QOB
HACR
MPF
ICBC
