There are several reasons why you may be receiving bounce backs.
- Your host has placed a limit on the number of emails you are allowed to send per hour.
- When this limit is in place, the server automatically bounces back to your domain all emails over the limit.
- The only way to find out your host’s sending limit is to ask them.
- If they say, for example, 500 per hour, go into the Setup > Email Systems > Show List
- Select “Choose Action” > “Edit”
- Choose “Options” > “Advanced”
- Set “Message Limit Per Run” to 500
- the software will then send 500 emails each time the cron task runs until all due emails have been sent. Active autoresponders are processed before broadcasts.
- Your email messages are getting “off” your server, but bouncing at the ISP.
- There are a number of reasons why your emails may be blocked by providers (like Hotmail, Gmail, AOL, etc.). For example:
Your IP address may be blocked.
The content in your messages may be blocked.
A URL in your message that is on a blacklist.
You may be sending messages to non-existent email addresses
- To diagnose why your messages are bouncing back, you will need to read the headers in the bounce message to determine the cause for the bounce in order to be able to correct it.
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