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!

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

cannot send messages

  • 2 respostas
  • 2 have this problem
  • 1 view
  • Last reply by foXrum

more options

hi, i can receive but not send messages anymore. i've got three email accounts. the accounts from my internet provider (whose i 'm using its SMTP server) is working fine and i can receive message with this account. the other two accounts don't send.

this is the error: An error occurred while sending mail. The mail server replied: MAIL FROM: <______________> does not match authenticated user name. Please check your email address in your account settings and try again.

i checked all settings and they look ok. i found out that if i change the port from 587 with password to 25 without password i can send email. this can't be a solution as it's a not secure connection and moreover it doesn't always work.

how to solve this? thanks

hi, i can receive but not send messages anymore. i've got three email accounts. the accounts from my internet provider (whose i 'm using its SMTP server) is working fine and i can receive message with this account. the other two accounts don't send. this is the error: An error occurred while sending mail. The mail server replied: MAIL FROM: <______________> does not match authenticated user name. Please check your email address in your account settings and try again. i checked all settings and they look ok. i found out that if i change the port from 587 with password to 25 without password i can send email. this can't be a solution as it's a not secure connection and moreover it doesn't always work. how to solve this? thanks

Chosen solution

ok i have found the solution. i have added new SMTP server with different settings for each account. since today i have always used my ISP SMTP server...

thanks

Ler a resposta no contexto 👍 0

All Replies (2)

more options

In order for us to better investigate this issue you need to add a little more non-personal information.

Please add the troubleshooting information to your post To find the Troubleshooting information:

  • Open Help (or click on three-line-icon and select Help)
  • Choose Troubleshooting Information
  • Use the button Copy to clipboard to select all. Do not check box "Include account names"!
  • Paste this in your post.

Please also add the result of these troubleshooting steps to your post

  • Does Thunderbird work in TB Safe mode (see Thunderbird Safe Mode)?
  • Do you use anti-virus and firewall software? What is the version?
  • Who is the email provider?
  • Who is the internet provider?

Please post back with this information and any other questions you might have.

more options

Chosen Solution

ok i have found the solution. i have added new SMTP server with different settings for each account. since today i have always used my ISP SMTP server...

thanks