This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

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

When I try to send a message to a group or reply all to a group I get this error: An error occurred while sending mail. The mail server responded: 5.2.0 3uaJ1x

  • 1 reply
  • 2 have this problem
  • 14 views
  • Last reply by Zenos

more options

Trying to send or "reply all" to a group message generates this error message. "An error occurred while sending mail. The mail server responded: 5.2.0 3uaJ1x0020rJ4F001uaJvR internal error. Please check the message and try again."

I can send individual emails and reply to individual emails without a problem. Only get error when sending group message or "replying all" to a group message.

Trying to send or "reply all" to a group message generates this error message. "An error occurred while sending mail. The mail server responded: 5.2.0 3uaJ1x0020rJ4F001uaJvR internal error. Please check the message and try again." I can send individual emails and reply to individual emails without a problem. Only get error when sending group message or "replying all" to a group message.

All Replies (1)

more options

Rats. 5.2.0 is about the most vague and unhelpful error code you could imagine. Typically, it's explained as "Other or undefined mailbox status".

How big is your "group"? What mix of To:, Cc: and Bcc: is being used? Are they separate discrete addresses or is a Mailing List being used? (I guess this isn't a Mailing List, since "reply all" wouldn't apply).

Have you reported this to your email provider? The error message is, after all, issued by their server.