Using the internal decoder for 7z archives doesn't work.

I created unencrypted 7z archives with 7-Zip [64] 16.02 (Windows version) with 
4 different compression methods (lzma2, lzma, ppmd, bzip2).

Here are the results:

Test 7z-file with internal decoder (lzma2)
amavis[5901]: (05901-01) p002 1/2 Content-Type: application/x-7z-compressed, 
size: 318239 B, name: calc_lzma2.7z
amavis[5901]: (05901-01) (!)do_unzip: not a zip: AZ_FORMAT_ERROR (3)

Test 7z-file with internal decoder (lzma)
amavis[5902]: (05902-01) p002 1/2 Content-Type: application/x-7z-compressed, 
size: 318080 B, name: calc_lzma.7z
amavis[5902]: (05902-01) (!)do_unzip: not a zip: AZ_FORMAT_ERROR (3)

Test 7z-file with internal decoder (ppmd)
amavis[5901]: (05901-01) p002 1/2 Content-Type: application/x-7z-compressed, 
size: 318239 B, name: calc_lzma2.7z
amavis[5901]: (05901-01) (!)do_unzip: not a zip: AZ_FORMAT_ERROR (3)

Test 7z-file with internal decoder (bzip2)
amavis[5910]: (05910-01) p002 1/2 Content-Type: application/x-7z-compressed, 
size: 392934 B, name: calc_bzip2.7z
amavis[5910]: (05910-01) (!)do_unzip: not a zip: AZ_FORMAT_ERROR (3)

From: amavis-users 
[mailto:amavis-users-bounces+christian.hoyer-reuther=cac-chem...@amavis.org] On 
Behalf Of Dino
Sent: Thursday, September 15, 2016 9:00 PM
To: amavis-users@amavis.org
Subject: Re: Encrypted archives and 7z on Debian Jessie (amavis 2.10.1)

So what happens when you try to extract a unencrypted 7z archive using the 
internal decoder? Does that work?

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