SMTP error

[handsprice]

I tried to send email using thunderbird, but it prompt an error as below :

"Sending of message failed.
An error occurred sending mail: Unable to authenticate to SMTP server mail.noblehouse-labuan.com. It does not support authentication (SMTP-AUTH) but you have chosen to use authentication. Uncheck 'Use name and password' for that server or contact your service provider."

how can i fix this problem?my secure pop3 is not a problem

[veronica]

Seems you have " My server requires authentication " clicked. Remove that. Pretty interesting , allows relaying.

[handsprice]

thanks for ur reply, where should i disable it? in thunderbird or in zimbra server? and i able to send from webmail...

[veronica]

Thunderird.

[handsprice]

i had tried what you suggested, but i get the error below

"An (SMTP) error occurred while sending mail. The server responded: Transaction failed"

"Sending of message failed.
The message could not be sent because the connection to SMTP server mail.noblehouse-labuan.com was lost in the middle of the transaction. Try again or contact your network administrator."

[veronica]

Seems to me to be a firewall issue. I have seen couple of times. Can you share /var/log/zimbra.log entry for this email transaction please ?