What Is Causing This Error?
This error occurs when an SMTP server rejects an email because it’s considered unsolicited or part of a bulk email campaign. Email providers have strict policies to prevent spam, requiring users to authenticate or verify their ability to send bulk emails. Unauthorized attempts to send mass emails typically trigger this response.
Resolving the Error – Solution
To address the “Error due to unsolicited and/or bulk e-mail,” begin by reaching out to your SMTP host to inquire about any sending or rate limits and confirm that your account is in good standing. It’s crucial to also verify that your account hasn’t been flagged for sending spam.
If your website might be compromised by spam bots, it’s important to implement spam protection measures. For strategies on safeguarding your site, review our guide on protecting your site from spam.
That’s it! Now you know how to fix the Error due to unsolicited and/or bulk e-mail.
If you’d like to learn how to troubleshoot other common errors, check out the following tutorials