Browse bounce messages for temporary below

4.0.0

Unknown issue

Undefined Issue

4.1.0

Unknown issue with recipient's email address

Recipient Address Problem

4.1.1

User name in email address not valid

Recipient Address Problem

4.1.2

Domain name of email address not valid

Recipient Address Problem

4.1.3

Email address malformed

Recipient Address Problem

4.1.4

Multiple mailboxes for recipient

Recipient Address Problem

4.1.5

Valid email address

Recipient Address Problem

4.1.6

Email address no longer accepts or forwards messages

Recipient Address Problem

4.1.7

Sender's address is written incorrectly

Bad Sending Address

4.1.8

Sending address is bad or can't accept replies

Bad Sending Address

4.1.9

Message routed to non-email system

Bad Recipient System

4.2.0

Unknown issue with mailbox

Recipient Mailbox Issue

4.2.1

Mailbox is not accepting new messages

Recipient Mailbox Disabled

4.2.2

Mailbox is full

Recipient Mailbox Full

4.2.3

Message is too long

Message Too Long

4.2.4

Mailbox has a mailing list system issue

Mailing List Problem

4.3.0

Unknown issue with the receiving system

Recipient System Problem

4.3.1

Email system is full

Recipient System Problem

4.3.2

Receiving email system not operating

Recipient System Problem

4.3.3

Message features not supported by receiving system

Recipient System Problem

4.3.4

Message is too large

Recipient System Problem

4.3.5

Recipient system incorrectly configured

Recipient System Problem

4.3.6

Message priority issue

Recipient System Problem

4.4.0

Unknown issue with network connection

Network Connection Problem

4.4.1

Network is busy

Network Connection Problem

4.4.2

Network connection timed out

Network Connection Problem

4.4.3

Network issue with the receiving system

Network Connection Problem

4.4.4

Email routing issue due to network

Network Connection Problem

4.4.5

Overloaded network

Network Connection Problem

4.4.6

Network issue caused a mail loop

Network Connection Problem

4.4.7

Message expired before delivery completed

Delivery Time Expires

4.5.0

Unknown issue with your email server

Mail Transmission Problem

4.5.1

Bad messaging command in transmission

Mail Transmission Problem

4.5.2

Email system sent bad command

Mail Transmission Problem

4.5.3

Too many recipients for message

Mail Transmission Problem

4.5.4

Email system sent bad command

Mail Transmission Problem

4.5.5

Email systems were incompatible

Mail Transmission Problem

4.5.6

Messaging command in transmission too long

Mail Transmission Problem

4.6.0

Unknown issue with the message content

Message Content Issue

4.6.1

Message content or attachment not supported

Message Content Issue

4.6.10

Email servers are not responding appropriately

Message Content Issue

4.6.2

Message content not accepted by recipient server

Message Content Issue

4.6.3

Message content could not be processed for delivery

Message Content Issue

4.6.4

Content loss during delivery

Message Content Issue

4.6.5

Message content not accessible to recipient server

Message Content Issue

4.6.6

Email content could not be accessed

Message Content Issue

4.6.7

Email address format not supported

Message Content Issue

4.6.8

Email servers are not responding appropriately

Message Content Issue

4.6.9

Email servers are not communicating with each other

Message Content Issue

4.7.0

Unknown security or policy concern

Security or Policy Issue

4.7.1

Message sender blocked by receiving server

Security or Policy Issue

4.7.10

Stronger security or encryption needed

Email Encryption Issue

4.7.11

Encryption needed for network connection

Email Encryption Issue

4.7.12

Authentication required

Authentication Required

4.7.13

Sender account disabled

Sender Account Issue

4.7.14

Potential security issue for sender

Security or Policy Issue

4.7.15

Message priority level too low

Message Priority Issue

4.7.16

Message too large for given priority level

Message Priority Issue

4.7.2

Not authorized to send to mailing list

Security or Policy Issue

4.7.3

Security features could not be interpreted

Security or Policy Issue

4.7.4

User authentication for message failed

Security or Policy Issue

4.7.5

Message authentication issues

Security or Policy Issue

4.7.6

Message encryption issues

Security or Policy Issue

4.7.7

Potentially corrupt message

Security or Policy Issue

4.7.8

User authentication failed

Security or Policy Issue

4.7.9

Security issue with user authentication

Security or Policy Issue