On Thu, Mar 24, 2011 at 10:42:58AM -0300, Odilo Schwade Junior wrote:

> Mar 24 10:17:10 mailserver postfix/smtpd[9301]: warning: SASL authentication
> failure: All-whitespace username.
> Mar 24 10:17:10 mailserver postfix/smtpd[9301]: warning:
> unknown[XXX.XXX.XXX.XXX]: SASL LOGIN authentication failed: generic failure
> Mar 24 10:17:11 mailserver postfix/smtpd[9301]: warning: SASL authentication
> failure: All-whitespace username.
> Mar 24 10:17:11 mailserver postfix/smtpd[9301]: warning:
> unknown[XXX.XXX.XXX.XXX]: SASL LOGIN authentication failed: generic failure

Is "unknown[XXX.XXX.XXX.XXX] your IP address or the IP address of a zombie
doing a brute-force attack?

If it is your IP address, perhaps your SASL login name is misconfigured.

-- 
        Viktor.

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