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.

ابحث في الدعم

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

Error message 'Header size exceeds fixed maximum size'?

  • 2 (ردّان اثنان)
  • 13 have this problem
  • 1 view
  • آخر ردّ كتبه joyfulloy

more options

I'm trying to send an email to a group of addressees, which I use frequently with no problems. I am sending a one page attachment which is not large. Every time I try and send it I get the error message, 'Header size exceeds fixed maximum size. Please check the message and try again.' I'm afraid I have no idea what this means.

I'm trying to send an email to a group of addressees, which I use frequently with no problems. I am sending a one page attachment which is not large. Every time I try and send it I get the error message, 'Header size exceeds fixed maximum size. Please check the message and try again.' I'm afraid I have no idea what this means.

الحل المُختار

Talk to your email provider or reduce the number of recipients.

Read this answer in context 👍 2

All Replies (2)

more options

الحل المُختار

Talk to your email provider or reduce the number of recipients.

more options

Thank you so much for your help. I reduced the number of recipients by 5 and the message has now sent. However, I'm still puzzled as to why it's suddenly decided that there were too many recipients when I've been using that same list for many months now. Thanks again.