This can happen if the email contains certain words, phrases, or images that are commonly associated with spam. Recipient Mailbox Full: If the recipient's mailbox is full and cannot accept any more messages, the email will bounce. , as the email might be delivered if the recipient frees up space in their mailbox. Enhanced SMTP Vs. Traditional SMTP: Table of Email Bounce Codes Traditional SMTP bounce codes are three-digit numbers indicating whether the delivery succeeded or failed. Enhanced SMTP bounce codes, however, are more detailed, giving a deeper insight into delivery failures.
Now, let's explore these codes in detail: Enhanced benin whatsapp phone number SMTP Bounce Codes In the three-number SMTP bounce codes, the first digit represents the delivery class: X.X signifies successful delivery X.X denotes issues in delivery temporarily X.X refers to permanent issues The second digit pinpoints where things go wrong. For example: In X.X, the '' indicates an addressing issue X.X represents an issue with the mailbox X.X denotes a mail system issue The third digit provides further detail on the specific issue. For example, means there’s a temporary failure, or the host isn’t answering.
Here’s a comprehensive email bounce code list for enhanced SMTP bounce codes: Email Bounce Code Description Successful delivery Temporary failure: No answer from the host Temporary failure: Mailbox busy Temporary failure: Mail system full Temporary failure: Network congestion Permanent failure: Bad destination email address Permanent failure: Mailbox disabled, not accepting messages Permanent failure: Mail system full Permanent failure: Network congestion Permanent failure: