SMTP bounce back error codes for Email Security.Cloud

Products

• Email Security.cloud

Issue/Introduction

You receive an SMTP error code, either when sending email to a domain protected by the Symantec Email Security.cloud service, or when sending outbound email through the Email Security.cloud service.

Learn how to interpret these common email bounce back error codes, to help troubleshoot and solve your email issues.

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553 Message filtered.

The error message indicates that your email was blocked as spam by our Signaturing anti-spam filter.

Perform the following steps to resolve the issue:

1. Check if your sending IP is on any spam lists, search for “spam database lookup”. You are looking for any 3rd party lists that may have received spam from your mail server. If your IP address is on any of these block lists, please make a removal request as soon as possible, once removed please retry sending your mail.
2. Ensure your mail server is not open relay, search for “Email Open Relay Tester” and choose from any number of testers.
3. If your internet line is provided by DSL or Cable that shares IP’s with residential users, please ensure your mail server sends to your ISP’s smart host instead of direct to the internet. This reduces the potential of your email being detected in error as coming from a Trojan infected home user machine.
4. Ensure the email you are sending does not contain any spam content (i.e. forwarded spam or ‘spamvertised’ URL’s).
5. Ensure your mail server is configured correctly.
6. Ensure you have no virus infected machines on your network that are being used to send spam through your mail server.
7. Ensure you have no exploitable web scripts on your web servers that could be abused to send spam. The most commonly used one is PHP contact scripts which spammers use to abuse the PHP “mail()” function, giving them free reign to send what they want.
8. Make sure any ‘opt-in’ newsletters contain an ‘opt-out’ link to be certain users can easily unsubscribe. If the problem persists, please contact the recipient by other means and request that your email address be added to their Symantec Cloud approved senders list.

If the problem persists, please contact the recipient by other means and request that your email address be added to their Symantec Cloud approved senders list. Additionally, a legitimate email which has been incorrectly given a verdict of spam can be submitted to Symantec for analysis and filter review. Please review the False Positive submission article to submit a false positive message for analysis.

Sample submission see: https://knowledge.broadcom.com/external/article?legacyId=TECH253894

553 Sorry, your email address has been blacklisted.

The error message indicates that your domain is on the recipient’s private block list.

Contact the recipient by other means and request that your email address be added to their Symantec Cloud approved senders list.

553 Sorry, your IP address has been blacklisted.

This error message indicates that your public IP address has been put on a block list by the Spamhaus PBL block list. To resolve this issue, please request to have your IP removed at http://www.spamhaus.org/pbl/.

The delisting process is normally quicker than an hour, once the hour has passed try to resend your email. If the problem persists, please contact the recipient by other means and request that your email address be added to their Symantec Cloud approved senders list.

553 Sorry, your domain has been blacklisted

The error message indicates that your IP address is on the recipient’s private block list.

Contact the recipient by other means and request that your email address be added to their Symantec Cloud approved senders list.

553 SPF (Sender Policy Framework) domain authentication fail.

553 DMARC domain authentication fail.

553 Recipient mailbox is not allowed.

The error message indicates that you have sent an email to an invalid address at the recipient’s domain.

Double check the email address for any spelling errors. If you believe the address is correct or if the problem persists, contact the recipient by other means to ask for further assistance.

553 mail rejected because your IP is in the PBL

This error message indicates that your public IP address has been put on a block list by the Spamhaus PBL block list. To resolve this issue, please request to have your IP removed at:http://www.spamhaus.org/pbl/.

The delisting process is normally quicker than an hour, once the hour has passed try to resend your email. If the problem persists, please contact the recipient by other means and request that your email address be added to their Symantec Cloud approved senders list.

553 sorry, your envelope sender is in my badmailfrom list

This error message indicates that the Symantec Email Security Service is blocking mail from the sender.

Check with your administrator or your Internet service provider (ISP) that you are not sending out any spurious emails. The block is removed if no spurious mail is seen within a 24-hour period. If the issue persists, contact Symantec Support.

553 you are trying to use me [server-x.tower-xx.messagelabs.com] as a relay, but I have not been configured to let you do this. Please visit www.symanteccloud.com/troubleshooting for more details about this error message and instructions to resolve this issue. (#5.7.1)

This error message indicates one of the following issues:

• Your DNS server has cached the recipient’s old MX record
• You are trying to relay outbound emails through MessageLabs from an incorrect IP address
• The recipient’s domain has an incorrect MX record
• The recipient’s email address contains invalid characters

Contact your administrator or your ISP to refresh your DNS server and then try to resend your email again. If the problem persists, please contact the recipient by other means and have them raise the issue with their IT team.

550 Requested action aborted [4]

The format of your message did not comply with RFC 2822.

Contact your IT administrator or ISP. If the problem persists, please contact the recipient.

550 Invalid recipient

This error message indicates that you have sent an email to an invalid address at the recipient’s domain.

Double-check the email address for any spelling errors. If you believe the address is correct, please wait 4-6 hours and then try to resend your email. If the problem persists, contact the recipient by other means to ask for further assistance.

501 Connection rejected by policy [1]

501 Connection rejected by policy [7.x]

I. Please check with your administrator or ISP that your mail server is not in open relay. Search “Open Relay Test” for an independent testing tool.

If your mail server is an open relay, please fix the open relay, wait 24 hours and then try to resend your email.

II. Please check with your administrator or ISP that your IP address is not on any spam block lists. Search “email blacklist check” to check using an independent tool.

If your IP address is on any block lists, please request for removal, wait 24 hours and then try to resend your email.

If the problem persists, please contact Symantec.cloud support for further assistance.

460 too many messages

The error message indicates that your company or ISP exceeded the number of messages allowed in the same connection.

Try resending your message. If the problem persists, contact your IT administrator or Internet service provider (ISP).

451 TLS/SSLv3 Connection required [11]. (#4.7.1)

450 Requested action aborted [3]

This error message indicates a temporary error.

Try resending your message. If the problem persists please contact your IT administrator or Internet service provider (ISP).

450 Requested action aborted [4]

The format of your message did not comply with RFC 2822 (seehttp://www.faqs.org/rfcs/rfc2822.html). Please contact your IT administrator or ISP. If the problem persists, please contact the recipient.

450 Requested action aborted [6]

 

450 Requested action aborted [9]

This error message indicates a temporary error.

Try resending your message. If the problem persists please contact your IT administrator or Internet service provider (ISP).

450 Connection rejected by policy [7.7]

421 too busy

This error message indicates a temporary error.

Try resending your message. If the problem persists please contact your IT administrator or Internet service provider (ISP).

421 Service Temporarily Unavailable

Sorry, your email address (addr) has been blacklisted

I. Please check with your administrator or ISP that your mail server is not in open relay. Search “Open Relay Test” for an independent testing tool.

If your mail server is an open relay, please fix the open relay, wait 24 hours and then try to resend your email.

II. Please check with your administrator or ISP that your IP address is not on any spam block lists. Search “email blacklist check” to check using an independent tool.

If your IP address is on any block lists, please request for removal, wait 24 hours and then try to resend your email.

If the problem persists, please contact the recipient by other means (e.g. phone) for further assistance.

Sorry, your IP address (ip-addr) has been blacklisted

I. Please check with your administrator or ISP that your mail server is not in open relay. Search “Open Relay Test” for an independent testing tool.

If your mail server is an open relay, please fix the open relay, wait 24 hours and then try to resend your email.

II. Please check with your administrator or ISP that your IP address is not on any spam block lists. Search “email blacklist check” to check using an independent tool.

If your IP address is on any block lists, please request for removal, wait 24 hours and then try to resend your email.

If the problem persists, please contact the recipient by other means (e.g. phone) for further assistance.

I have not yet been able to deliver your message

This error message indicates that the Symantec.cloud server was not able to deliver the email to the recipient’s server so it has queued the email for re-delivery at a later time. This error can be caused by the recipient’s mail server being unavailable at the time.

We will continue to try to redeliver the email periodically.

Contact your administrator for more details or contact the recipient by other means.

Connection refused or connection deferred

This error message indicates that your email may have been blocked as spam by our SMTP traffic shaping filter. Please try the following steps to resolve the issue:

I. Please check with your administrator or ISP that your mail server is not an open relay. Search for “Open Relay Tester” to find a suitable test site.

If your mail server is an open relay, please fix the open relay and wait 24 hours, then try to resend your email.

II. Please check with your administrator or ISP that your IP address is not on any spam block lists, search for “spam database lookup” for a suitable testing site.

You are looking for any 3rd party lists that may have received spam from your mail server.

If your IP address is on any of these block lists, please make a removal request as soon as possible, once removed please retry sending your mail.

Cause

Please click on the respective error message link to obtain more information.

Environment

• Email Security.cloud
• Symantec.cloud

Resolution

Follow the instruction provided on each articles describing the error in more details.