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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:
STS
HM
02650
ISBU
18352
PIBL
RIP
QPI
PFG P
VOE
15203
29440
91803
HCFI
SDNT
