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When there is a problem delivering your message to its destination you receive an error message included in the mail returned from our system. The following information will give you more details on the meaning of the error message and the steps you can take to solve the problem. For a list of non specific error message (example 550 mailbox not found) please visit Mailer-Daemon Errors.
The codes are listed in categories based on the first part of the error message or the section that comes before the colon. Click the appropriate link above to find your error message. (example; 554HVU:B4, click on the HVU link and then navigate to your error message.) If you need help interpreting the information in the e-mail and finding the error message included, please read interpreting e-mail headers.
- Click the error code for more information and troubleshooting.
- 554 RTR:BB
http://postmaster.info.aol.com/errors/554rtrbb.html
AOL works with many ISPs to maintain lists of dynamic and residential IP addresses. Per our E-mail Guidelines, we do not accept mail from these addresses, as it is difficult to determine who is responsible for mail being generated by these IP's.
- 554 RTR:DU
http://postmaster.info.aol.com/errors/554rtrdu.html
AOL works with http://www.spamhaus.org to maintain lists of dynamic and residential IP addresses. Per our E-mail Guidelines, we do not accept mail from these addresses, as it is difficult to determine who is responsible for mail being generated by these IP's.
- Click the error code for more information and troubleshooting.
- Click the error code for more information and troubleshooting.
- Click the error code for more information and troubleshooting.
- 554 RLY:B1
http://postmaster.info.aol.com/errors/554rlyb1.html
This error message is a dynamic block on our system. Dynamic blocks are placed on an IP address when AOL member complaints go over our set threshold. These are automated blocks that are removed by the system within 24 hours if the complaints are below the threshold.
- Click the error code for more information and troubleshooting.
- 554 ISP:B2
http://postmaster.info.aol.com/errors/554ispb2.html
Your IP address has generated a high volume of mail to AOL which exceeded our rate limit or has generated AOL member complaints. Possible causes include a compromised or virus-infected personal computer or a non-disclosed server relaying mail within the ISP's network. Note, this block is automatically removed within 24 hours.
- 421 ISP:B2
http://postmaster.info.aol.com/errors/421ispb2.html
Your IP address has generated a high volume of mail to AOL which exceeded our rate limit or has generated AOL member complaints. Possible causes include a compromised or virus-infected personal computer or a non-disclosed server relaying mail within the ISP's network. Note, this block is automatically removed within 24 hours.
- 554 ISP:B3
http://postmaster.info.aol.com/errors/554ispb3.html
Your IP address has generated a high volume of mail to AOL which exceeded our rate limit or has generated AOL member complaints. Possible causes include a compromised or virus-infected personal computer or a non-disclosed server relaying mail within the ISP's network. Note, this block is automatically removed within 24 hours.
- 421 ISP:B3
http://postmaster.info.aol.com/errors/421ispb3.html
Your IP address has generated a high volume of mail to AOL which exceeded our rate limit or has generated AOL member complaints. Possible causes include a compromised or virus-infected personal computer or a non-disclosed server relaying mail within the ISP's network. Note, this block is automatically removed within 24 hours.
- 554 ISP:B4
http://postmaster.info.aol.com/errors/554ispb4.html
Your IP address has generated a high volume of mail to AOL which exceeded our rate limit or has generated AOL member complaints. Possible causes include a compromised or virus-infected personal computer or a non-disclosed server relaying mail within the ISP's network. Note, this block is automatically removed within 24 hours.
- 421 ISP:B4
http://postmaster.info.aol.com/errors/421ispb4.html
Your IP address has generated a high volume of mail to AOL which exceeded our rate limit or has generated AOL member complaints. Possible causes include a compromised or virus-infected personal computer or a non-disclosed server relaying mail within the ISP's network. Note, this block is automatically removed within 24 hours.
- 554 ISP:IT
http://postmaster.info.aol.com/errors/554ispit.html
The IP address on your ISP's webmail network has generated a high volume of mail to AOL and has exceeded our rate limit or has generated a large number of AOL member complaints. Possible causes include a compromised or virus-infected personal computer or a non-disclosed server relaying mail with in the ISP's network.
- Click the error code for more information and troubleshooting.
- Click the error code for more information and troubleshooting.
- Click the error code for more information and troubleshooting.
- Click the error code for more information and troubleshooting.
- Click the error code for more information and troubleshooting.
- Click the error code for more information and troubleshooting.
- Click the error code for more information and troubleshooting.
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