Re: Monit will not mail: Sendmail error: 550 must be authenticated

[Martin Pala]

Hi,

the error is returned by the MTA smtp.1und1.de, which is first in the 
server list and requires the authentication:


-bash-2.05b$ telnet smtp.1und1.de 25
Trying 212.227.15.167...
Connected to smtp.1und1.de.
Escape character is '^]'.
220 212.227.15.167 (mrelayeu4) Welcome to Nemesis ESMTP server
helo creutz.net
250 mrelayeu4.kundenserver.de pleased to meet you
mail from:<address@hidden>
250 mail from: <address@hidden> ok
rcpt to:<address@hidden>
550 must be authenticated

Your local mail utility posts the message via local MTA (you mentioned 
postfix), which probably doesn't require authentication and allows to 
send the mail.

To fix the problem, just use some MTA in the 'set mailserver ...' 
statement which will allow you to send the mail without authentication 
(e.g. localhost).


Martin



Andre Creutz wrote:
> Hi all,
>
> A few days ago i updatet from Version 4.6 to the newest 4.8.1 and i changed
> the settings in monitrc to:
> -------schnipp-----------
> set daemon      90
> set logfile     /var/log/monit.log
> set mailserver  smtp.1und1.de, smtp.mail.yahoo.de localhost with timeout 30
> seconds
> set alert       address@hidden
> set mail-format {    from: address@hidden
>                   subject: $SERVICE $EVENT at $DATE
>                   message: Monit $ACTION $SERVICE at $DATE on $HOST.
>                   Ihr freundlicher Kollege,
>                   Monit
>                 }
>
> # Monit http server settings:
> # ---------------------------
>
> set httpd port 2812
>         ssl     enable
>         pemfile "/var/certs/monit.pem"
>         allowselfcertification
> #       allow   localhost
>         allow   creutz:*******
>
> # Event Queue
> set eventqueue
>         basedir /etc/monit/
>         slots 5000
> --------schnapp---------------
>
> I changed the settings "set logfile" from syslog to /var/log/monit.log
> And i addet # Event Queue
>
> Since this time monit will not send any mails to the address. It produces
> this Errormessage in /var/log/monit.log:
>
> [CEST Jun 22 10:08:33] error    : Sendmail error: 550 must be authenticated
> [CEST Jun 22 10:08:33] error    : Alert handler failed, retry scheduled for
> next cycle
>
> If i try to send a mail with
> mail -s testmail address@hidden
> It workt perfectly and before the changes monit was sending mails without a
> problem. At this reason i guess (i hope)my postfix is working fine. 
>
> Is there any help out there?? (grin) Please
>
> Next i try the old monitrc, but the problem is still there.
>
> Thanks a lot and
> Best regards
> andre