![]() ![]() ![]() Email admins review these text strings, and their corresponding bounce codes to determine where problems occur – either on the sender’s side or the receiver’s. In addition to these numeric designations, extended descriptors shed more light on why messages aren’t being delivered. ![]() To reduce the amount of spam sent to DOMAIN, this message has been blocked. Host :ĥ50-5.7.1 Our system has detected that this message is likely unsolicited mail. SMTP error from remote mail server after end of data: A sample bounce code might look something like this:.These bounces are classified with a 5.x.x (again the x’s are variables). Permanent failures (also known as hard bounces) are just that, permanent failures that will prevent the message from being delivered to the intended recipient.We refer to this code as a 4.x.x (the x’s are variables). There’s a numeric code that is attached, or used to define the temporary failure. Transient bounces (also known as soft bounces) are defined as temporary failures or conditions that once they change will allow for the delivery of the message.There are two basic bounce that RFC 1893 defines (and in case you didn’t know, RFC’s are the standards that describe internet technologies and are maintained by the IETF, also check out RFC 5248 ): They’re uncertain, fraught with danger, and should be approached with healthy amounts of respect and caution.īefore getting into the meat of bounce codes, let’s review the basics. Giddy-up partner! We got varmints out yonder! Just kidding… but in all seriousness, bounce codes are a little like the wild west. Navigating Bounce Codes in the Wild West of Email ![]()
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