FEDEX
FEDEX_2_DAY
FEDEX_2_DAY_AM
FEDEX_EXPRESS_SAVER
FEDEX_GROUND
FEDEX_INTERNATIONAL_CONNECT_PLUS
FIRST_OVERNIGHT
GROUND_HOME_DELIVERY
INTERNATIONAL_ECONOMY
INTERNATIONAL_FIRST
INTERNATIONAL_PRIORITY
PRIORITY_OVERNIGHT
SMART_POST
STANDARD_OVERNIGHT
UPS
Ground
UPSStandard
UPSSaver
Express
ExpressPlus
Expedited
NextDayAir
NextDayAirSaver
NextDayAirEarlyAM
2ndDayAir
2ndDayAirAM
3DaySelect
UPS DISCOUNTED RATE PROGRAM (DRP) FROM SHIPLEAP
SLH_Ground
SLH_UPSStandard
SLH_UPSSaver
SLH_Express
SLH_ExpressPlus
SLH_Expedited
SLH_NextDayAir
SLH_NextDayAirSaver
SLH_NextDayAirEarlyAM
SLH_2ndDayAir
SLH_2ndDayAirAM
SLH_3DaySelect
USPS
First
Priority
Express
ParcelSelect
LibraryMail
MediaMail
GroundAdvantage
FirstClassMailInternational
FirstClassPackageInternationalService
PriorityMailInternational
ExpressMailInternational
GSO
EarlyPriorityOvernight
CaliforniaParcelSelect
CaliforniaParcekService
SaturdayDeliveryService
EarlySaturdayService
Ground
PriorityOvernight
Overnight
DHL
DHLParcelExpedited
DHLParcelExpeditedMax
DHLParcelGround
DHLBPMExpedited
DHLBPMGround
DHLParcelInternationalDirect
DHLParcelInternationalStandard
DHLPacketInternational
DHLParcelInternationalDirectPriority
DHLParcelInternationalDirectStandard
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Here are the options you can use in the file
additional_handling
alcohol
carbon_neutral
delivery_confirmation
hold_for_pickup - Package will wait at carrier facility for pickup. For example, package will need to be picked up at the UPS store
special_rates_eligibility (aka media mail for USPS)
delivery_confirmation
hold_for_pickup
saturday_delivery
certified_mail