550 5.7.1 0A1An6xf002348 This message has been blocked for containing SPAM-like characteristics.
550 5.7.1 0A1An6xf002348 This message has been blocked for containing SPAM-like characteristics.
this error message comes when sending e-mails since the last update. How can I fix this.
thanks for help
All Replies (1)
The message is from your email provider's server. So you should talk to them. It has got nothing to do with a Thunderbird update.
Things you can try to avoid this are
- compose messages in plain text instead of HTML
- avoid HTML signatures
- avoid including files in signatures