> I have a serious problem with Amavis at the moment because Amavis holds
> every e-mail larger than 0,1MB and puts it in a loop in
> /var/lib/amavis/tmp
>
> I'm using Amavis+ClamAV+Maia. First of all I have changed the quota
> setting in  the Maia-DB to -1 because at the first time Maia was blocking
> the e-mail icm with Amavis.

> Jun 22 18:10:51 mail amavis[26878]: (26878-01) Charging 6200651 bytes to
> remaining quota 100418 (out of 102400, (6057%)$
> Jun 22 18:10:51 mail amavis[26878]: (26878-01) Exceeded storage quota
> 102400 bytes by mime_decode; last chunk 6200651 b$

> Where is the quota of 0,1MB set also ?

The decoding quota is calculated from the original mail size and the
following settings:
  $MIN_EXPANSION_QUOTA
  $MAX_EXPANSION_QUOTA
  $MIN_EXPANSION_FACTOR
  $MAX_EXPANSION_FACTOR

according to the formula in amavisd.conf-sample:

# For the cumulative total of all decoded mail parts we set max storage size
# to defend against mail bombs. Even though parts may be deleted (replaced
# by decoded text) during decoding, the size they occupied is _not_ returned
# to the quota pool.
#
# Parameters to storage quota formula for unpacking/decoding/decompressing
#   Formula:
#     quota = max($MIN_EXPANSION_QUOTA,
#                 $mail_size*$MIN_EXPANSION_FACTOR,
#                 min($MAX_EXPANSION_QUOTA, $mail_size*$MAX_EXPANSION_FACTOR))
#   In plain words (later condition overrules previous ones):
#     allow MAX_EXPANSION_FACTOR times initial mail size,
#     but not more than MAX_EXPANSION_QUOTA,
#     but not less than MIN_EXPANSION_FACTOR times initial mail size,
#     but never less than MIN_EXPANSION_QUOTA
#
$MIN_EXPANSION_QUOTA =      100*1024;  # bytes  (default undef, not enforced)
$MAX_EXPANSION_QUOTA = 300*1024*1024;  # bytes  (default undef, not enforced)
$MIN_EXPANSION_FACTOR =   5;  # times original mail size  (default is 5)
$MAX_EXPANSION_FACTOR = 500;  # times original mail size  (default is 500)


Btw, recent version of amavisd-new no longer keep mail in MTA queue,
but flag it as undecodable and pass it on, defanged.

  Mark


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