Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

Pomoc pśepytaś

Glědajśo se wobšudy pomocy. Njenapominajomy was nigda, telefonowy numer zawołaś, SMS pósłaś abo wósobinske informacije pśeraźiś. Pšosym dajśo suspektnu aktiwitu z pomocu nastajenja „Znjewužywanje k wěsći daś“ k wěsći.

Learn More

Unable to send message

  • 1 wótegrono
  • 2 matej toś ten problem
  • 1 naglěd
  • Slědne wótegrono wót Zenos

more options

Alert Message An error occured while sending mail. The mail server responded 5.7.1 The message contains an unauthorized custom from address because the 5.7.1 associated account has been disabled or deleted. Please revalidate. 5.7.1 the custom from if you believe this to be in error. q2sm8373328wia.19 - gsmtp. Please check the message and try again.

Alert Message An error occured while sending mail. The mail server responded 5.7.1 The message contains an unauthorized custom from address because the 5.7.1 associated account has been disabled or deleted. Please revalidate. 5.7.1 the custom from if you believe this to be in error. q2sm8373328wia.19 - gsmtp. Please check the message and try again.

Wšykne wótegrona (1)

more options

So it looks like you're trying to send using a from: address which appears to have been removed, disabled or retired.

The message is from a server. You need to check if all the addresses offered in Thunderbird as from: addresses are current and valid.

But now I see other posts saying pretty much the same, which has me wondering if this is a problem at the server.

Who is your mail provider?

https://support.mozilla.org/en-US/questions/1014299

Wót Zenos změnjony