Receiving works fine, but unable to send email from the server
Here are the error messages
dovecot_login authenticator failed for localhost [127.0.0.1]: 435 Unable to authenticate
error message in horde
There was an error sending your message: authentication failure [SMTP: Invalid response code received from server (code: 435, response: Unable to authenticate at present)]
I've come across this problem before.
Usually it happens because outport 25port is blocked to avoid spam or it is blocked by your own firewall.
The second,check your dns record.
Nice to know another mothed!
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