[Mimedefang] Milter: data, reject=451 4.7.1 Please try again later

[Rick Mallett]

Is

  define(`SMTP_MAILER_MAX',15000000)

as recommended below the same as

  define(`confMAX_MESSAGE_SIZE', '15000000')dnl

or is there a subtle difference between them. We have the latter defined
in our .mc file to protect against excessively sized messages, but are
we still vulnerable to running out of memory and/or swap space.

- rick

On Sun, 11 May 2003, Paul Murphy wrote:

> Yes:
>
> > May  9 20:38:51 wuhan sendmail[20860]: [ID 801593 mail.info]
> h4A2AAsR020860:
> > from=<lstevens at k2architects.com>, size=449133930, class=0, nrcpts=1,
>
> Someone tried to send you half a gigabyte in your mail, and your system
> attempted to process it.  Since the Mimedefang spool directory is on your
> swap space, and in addition Mimedefang has to allocate enough memory to
> process the message, you ran out of memory and swap.  Not surprising really -
> there are few systems which could cope with a message this size.
>
> > May  9 20:40:20 wuhan mimedefang[13560]: [ID 480956 mail.warning]
> >h4A2AAsR020860: writen failed: No space left on device line 979
>
> Your "df -k" display is of course after the event - during processing, one of
> the file systems filled up, almost certainly your spool directory.
>
> The solution is to configure Sendmail to limit the size of messages, using
>
> define(`SMTP_MAILER_MAX',15000000)
>
> in your .mc file - i.e. approx 15Mb in this case.
>
> Alternatively, if you really must transfer files of this size around, use FTP
> or an HTTP upload, and ZIP the file - MIME encoding adds 50% to the size, so
> the 450Mb mail message probably has a 300Mb attachment set, which could
> compress down to 150Mb or less.
>
> Best Wishes,
>
> Paul.
>
> _______________________________________________
> MIMEDefang mailing list
> MIMEDefang at lists.roaringpenguin.com
> http://lists.roaringpenguin.com/mailman/listinfo/mimedefang
>