Join us to show up for other Firefox users 🦊. Earn fun badges and Mozilla swag vouchers! Find out more: https://mzl.la/askafox150

Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

I am unable to send email

  • 1 reply
  • 0 have this problem
  • 15 views
  • Last reply by david
  • Open

host eig-east.smtp.a.cloudfilter.net [18.215.58.191]

   SMTP error from remote mail server after end of data:
   550 Connection Rejected - see http://www.spamhaus.org/query/ip/162.241.253.30 AUP#BL
host eig-east.smtp.a.cloudfilter.net [18.215.58.191] SMTP error from remote mail server after end of data: 550 Connection Rejected - see http://www.spamhaus.org/query/ip/162.241.253.30 AUP#BL

All Replies (1)

Did you check the page that the URL is pointing to for an explanation? an error 550 can be invalid email address, mailbox full, and other causes. Here is a page of general 550 info. I encourage reading the full URL from your error. Thunderbird is not causing this.

Ask a question

You must log in to your account to reply to posts. Please start a new question, if you do not have an account yet.