Bounces report
Hard and Soft bounces
In such cases, when the message cannot be delivered to the recipient, the mail server sends back an error message. There are two types of these errors: Hard bounce and Soft bounce.
Hard bounces are server class errors (5xx). Such errors occur in cases, when sending to the mail server is impossible, for example, the email does not exist. If the server returns a Hard bounce error, the platform changes the profile status to "Hard bounced" and adds the email address to the global supression list. As long as the address is in the global supression list, you will not be able to send a message to it. You can remove an address from the global supression list only in the administration panel in the "Supression list " section .
Email addresses with Hard bounce errors are collected in the supression list located in the administration panel. This should not be confused with the Global suppress list in the user panel.
Soft bounces are sending client errors (4xx). Unlike Hard bounce, Soft bounce does not affect customer subscription statuses. If a Soft bounce is received, the platform tries to resend the message according to resend rules. If the message cannot be delivered, the platform will record a non-delivery event.
The reasons of Soft bounce can be:
- Subscriber inbox is full
- Letter attachments are too big for subscriber mail server
- Email service is temporarily unavailable
This report will allow you to track the number of Email messages that didn't get delivered to recipients the first time. In other words, soft bounces are combined in this report.
Report settings
To start working on bounces report, you need to select time period and campaign (or "all campaigns").
Also, you can use grouping by from domain or IP address that was used for mailing.
Grouping by from domain:
Grouping by IP address
You can download report in MS Excel or CSV formats.
Table
The following information is displayed in the table:
- email domain that was used for sending campaigns;
- bounce text (reply from provider about customer email temporary unavailable);
- amount - number of message bounces if one message was sent several times.
To view the full error message, hover over the bounce text. A list of common soft bounce reasons and their descriptions is provided in the table below:
| Bounce text | Description |
|---|---|
421 Message source blocked temporarily. One or more sender authentication rules matched. | Messages from this sender are temporarily blocked due to a failure to meet email authentication rules. This can occur if the sender did not pass SPF, DKIM, or DMARC verification. The sender's From-domain authentication settings should be checked. |
421 Service Temporarily Unavailable | The server is temporarily unavailable, potentially due to overload or technical maintenance. |
451 Please try again later | A temporary issue on the server side, likely due to overload or maintenance. |
451 <<EMAIL>>: Recipient address rejected: Intentional policy rejection, please try again later | The recipient's email address was rejected based on server policy. This may happen due to incorrect settings on the recipient’s side or if the sender was previously marked as spam. |
450 <<EMAIL>>: Sender address rejected: Greylisted for 120 seconds! Please, see <URL> | The sender’s address is temporarily rejected due to greylisting. The server temporarily refuses messages from the sender and expects the sender to retry after the specified time. The platform will automatically retry after 120 seconds. If the issue persists after retrying, the sender’s settings should be checked. |
The Altcraft platform allows an inaccuracy of 0.02% when generating reports.