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CanonicalNameChainTooLong
relaymanager
ESMTPManagedRelayer
ESMTPManagedRelayerFactory
ManagedRelayerMixin
MXCalculator
Queue
SmartHostESMTPRelayingManager
SmartHostSMTPRelayingManager
SMTPManagedRelayer
SMTPManagedRelayerFactory
CanonicalNameLoop
_AttemptManager
RelayStateHelper
_checkState
twisted.mail.relaymanager.CanonicalNameChainTooLong
twisted
mail
class CanonicalNameChainTooLong(Exception): (source)
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An error indicating that when trying to look up a mail exchange host, too many canonical name records which point to other canonical name records were encountered and resolution was abandoned.