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

Wannan tattunawa ta zama daɗaɗɗiya. Yi sabuwar tambaya idan ka na bukatar taimako.

"Alert. An error occured while sending mail. 5.1.1 recipient rejected. Please check the message recipient & try again. This happens every time now.

  • 1 amsa
  • 3 sa na da wannan matsala
  • 10 views
  • Amsa ta ƙarshe daga user01229325

more options

I don't seem to be able to send out ANY emails now. It started with me trying to send a message and I would get the error (that I will send you & include in this query) once and then try sending again and it worked. Then, it deteriorated and after 3 consecutive attempts to send out an email it would successfully be sent. Now, it seems that every time I try to send an email out, I get the same old error and it won't send no matter how many attempts I try. Here is the full version of the error message:

Alert, An error occurred while sending mail. The mail server responded: 5.1.1 <davidlcristofoli@icloud.com> recipient rejected. Please check the message recipient "davidlcristofoli@icloud.com" and try again.

I am currently running version 55.0b2 (64-bit) on a Mac Book Pro.

Any help would be greatly appreciated. Thank-you for your valuable time.

Sincerely, David

I don't seem to be able to send out ANY emails now. It started with me trying to send a message and I would get the error (that I will send you & include in this query) once and then try sending again and it worked. Then, it deteriorated and after 3 consecutive attempts to send out an email it would successfully be sent. Now, it seems that every time I try to send an email out, I get the same old error and it won't send no matter how many attempts I try. Here is the full version of the error message: Alert, An error occurred while sending mail. The mail server responded: 5.1.1 <davidlcristofoli@icloud.com> recipient rejected. Please check the message recipient "davidlcristofoli@icloud.com" and try again. I am currently running version 55.0b2 (64-bit) on a Mac Book Pro. Any help would be greatly appreciated. Thank-you for your valuable time. Sincerely, David

All Replies (1)

more options

Have you gone to your apple email account and setup the mandatory 2 factor authorization and generated an app specific password?

If not you need to. https://support.apple.com/en-us/HT204915

FYI:Next time just add to your original post and do not start a new one. You are not sending emails you are posting to this forum