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emails keep bouncing back

boomerangbythesea
boomerangbythesea
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This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed: 

 [email protected]
   host conrock-net-au.mail.protection.outlook.com [213.199.154.23]
   SMTP error from remote mail server after RCPT TO:<[email protected]>:
   550 5.7.1 Service unavailable; Client host [27.121.64.106] blocked using Spamhaus; To request removal from this list see http://www.spamhaus.org/lookup.lasso
This message was created automatically by mail delivery software. A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed: [email protected] host conrock-net-au.mail.protection.outlook.com [213.199.154.23] SMTP error from remote mail server after RCPT TO:<[email protected]>: 550 5.7.1 Service unavailable; Client host [27.121.64.106] blocked using Spamhaus; To request removal from this list see http://www.spamhaus.org/lookup.lasso

All Replies (1)

amanchesterman
amanchesterman
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The message is telling you that your email provider has been blocked by the recipient's email provider. It gives you a link (the spamhaus link) to request that it be unblocked. This is nothing to do with Thunderbird.