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BounceStudio™ API - Email Bounce Return Codes

Return CodeDescription
0UNDETERMINED - (ie. Recipient Reply)
10HARD BOUNCE - (ie. User Unknown)
20SOFT BOUNCE - General
21SOFT BOUNCE - Dns Failure
22SOFT BOUNCE - Mailbox Full
23SOFT BOUNCE - Message Too Large
30BOUNCE - NO EMAIL ADDRESS. VERY RARE!
40GENERAL BOUNCE
50MAIL BLOCK - General
51MAIL BLOCK - Known Spammer
52MAIL BLOCK - Spam Detected
53MAIL BLOCK - Attachment Detected
54MAIL BLOCK - Relay Denied
60AUTO REPLY - (ie. Out Of Office)
70TRANSIENT BOUNCE
80SUBSCRIBE Request
90UNSUBSCRIBE/REMOVE Request
100CHALLENGE-RESPONSE



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