Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

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

This thread was archived. Please ask a new question if you need help.

My wife uses Thunderbird client and it has stopped sending emails -see below

  • 5 replies
  • 1 has this problem
  • 19 views
  • Last reply by ianskeeby

ianskeeby
ianskeeby
more options

An error occurred while sending mail. The mail server responded: 5.4.6 <email address>: Recipient address rejected: Email Sending Quota Exceeded. 

Please check the message recipient "email address" and try again.

My wife's computer has stopped sending emails following a reject from a group mailing which has worked previously. Now it seems to block all outgoing email addresses, single addresses or multiple addresses. If it is being blocked, what is blocking it?

An error occurred while sending mail. The mail server responded: 5.4.6 <email address>: Recipient address rejected: Email Sending Quota Exceeded. Please check the message recipient "email address" and try again. My wife's computer has stopped sending emails following a reject from a group mailing which has worked previously. Now it seems to block all outgoing email addresses, single addresses or multiple addresses. If it is being blocked, what is blocking it?

All Replies (5)

user01229325
user01229325
more options

The error is from your email provider. It states you sent more than your quota of messages. I suggest you discuss your sending limits with the provider.

ianskeeby
ianskeeby Question owner
more options

I will try what you suggest Thanks

ianskeeby
ianskeeby Question owner
more options

I have checked, my provider is not blocking email nor is it over quota. Could it be Thunderbird puts temporary block on email addresses if large number or recipients selected, I understand this can happen to stop spammers who hack your email? I am not sure what limit is on Thunderbird?

user01229325
user01229325
more options

The error says the "mail server". Thunderbird does not have servers, your provider does. Thunderbird does not have limits or block messages. Tell your provider nice try to deflect the blame.

ianskeeby
ianskeeby Question owner
more options

Thanks I wonder if it is Windows defender? I am baffled.