451 4.3.0 Temporary internal failure

[Urban Loesch]

Hi,

according to dovecot.conf lmtp stores all mails temporarily in "/tmp/" 
that are bigger than 256KB. You can change the directory in dovecot.conf 
or you should increase the /tmp/ size. It could be that /tmp/ is a 
ramdisk. Check /etc/fstab.

Which os you are using?
What does "df -hT" say?
What does /etc/fstab say?

Regards
Urban

Am 03.08.2015 um 19:54 schrieb Nutsch:
> Hi
>
> i can send mails without problems in any direction, except when the
> attachments are bigger than 1 MB. I alway get this message
>
> relay=mail.example.net[private/dovecot-lmtp], delay=35155,
> delays=35155/0.03/0.02/0.09, dsn=4.3.0, status=deferred (host
> mail.example.net[private/dovecot-lmtp] said: 451 4.3.0 Temporary
> internal failure (in reply to end of DATA command)) Aug  3 19:34:34
> 46185 dovecot: lmtp(6477): Disconnect from local: Temporary internal
> failure (in DATA)
>
>
> postconf message_size_limit
> message_size_limit = 0
> postconf mail_size_limit
> mailbox_size_limit = 0
>
> i can send big attachments to an extern address but not from intern to
> intern. Someone said that maybe the tmp directory is the problem so i
> checked the size.
>
> ls -ald /tmp/; df -h /tmp/
> drwxrwxrwt 4 root root 80 Aug  3 19:44 /tmp/
> Filesystem      Size  Used Avail Use% Mounted on
> -               1,0M  4,0K 1020K   1% /tmp
> root at example:/tmp#
>
> is there a connection between lmtp and the size of the tmp directory?
> And why is the size 1,0M, tmp is not an own partion. Should i increase
> the size? And if yes, how?
>
> df -h
> Filesystem      Size  Used Avail Use% Mounted on
> /dev/vzfs        80G   12G   69G  15% /
>
> ???
>
> br. noctua