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.

Avatar for Username

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

Èròjà atẹ̀lélànà yii ni a ti fi pamọ́ fọ́jọ́ pípẹ́. Jọ̀wọ́ béèrè ìbéèrè titun bí o bá nílò ìrànwọ́.

Error message 'Header size exceeds fixed maximum size'?

  • 2 àwọn èsì
  • 13 ní àwọn ìṣòro yìí
  • 1 view
  • Èsì tí ó kẹ́hìn lọ́wọ́ joyfulloy

joyfulloy
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.

Ọ̀nà àbáyọ tí a yàn

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

Ka ìdáhùn ni ìṣètò kíkà 👍 2

All Replies (2)

christ1
christ1
  • Top 25 Contributor
more options

Ọ̀nà àbáyọ Tí a Yàn

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

joyfulloy
joyfulloy Ìbéèrè olóhun
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.