_WARN: no decoder for unknown

[Alex]

Hi,

I'm using amavisd-new-2.11.0 on fedora28 and trying to figure out why
amavisd can't determine the file type for these files. Are they
corrupt files or possible malware?

Aug 19 02:20:36 mail01 amavis[18837]: (18837-03) _WARN: no decoder for
unknown at /usr/share/perl5/vendor_perl/MIME/Parser.pm line 789.
Aug 19 02:20:36 mail01 amavis[18837]: (18837-03) _WARN: no decoder for
unknown at /usr/share/perl5/vendor_perl/MIME/Parser.pm line 789.
Aug 19 02:20:36 mail01 amavis[18837]: (18837-03) _WARN: no decoder for
unknown at /usr/share/perl5/vendor_perl/MIME/Parser.pm line 789.
Aug 19 02:20:36 mail01 amavis[18837]: (18837-03) p007 1 Content-Type:
multipart/mixed
Aug 19 02:20:36 mail01 amavis[18837]: (18837-03) p008 1/1
Content-Type: multipart/alternative
Aug 19 02:20:36 mail01 amavis[18837]: (18837-03) p001 1/1/1
Content-Type: text/plain, base64, size: 1612, SHA1 digest:
07d23acaf55df3d872add0de08cd2f48f167c7b9
Aug 19 02:20:36 mail01 amavis[18837]: (18837-03) p002 1/1/2
Content-Type: text/html, base64, size: 4543, SHA1 digest:
2aa6f4155815f2237beebb6948406cf86a9bd7cd
Aug 19 02:20:36 mail01 amavis[18837]: (18837-03) p003 1/1/3
Content-Type: text/calendar, QP, size: 2492, SHA1 digest:
c9e703bf749509facf3707e9520c4a82620d7a8f
Aug 19 02:20:36 mail01 amavis[18837]: (18837-03) p009 1/2
Content-Type: multipart/mixed
Aug 19 02:20:36 mail01 amavis[18837]: (18837-03) p004 1/2/1
Content-Type: application/ms-tnef, unknown, size: 11595, SHA1 digest:
0bb205ec88ccb034899ed1b929f46d1b92f602dd, name: winmail.dat
Aug 19 02:20:36 mail01 amavis[18837]: (18837-03) p005 1/2/2
Content-Type: application/ms-tnef, unknown, size: 4919, SHA1 digest:
6986e5c930634d72e55f7e6bd9ec9d63d87e2, name: winmail.dat
Aug 19 02:20:36 mail01 amavis[18837]: (18837-03) p006 1/2/3
Content-Type: application/ms-tnef, unknown, size: 725390, SHA1 digest:
713457384c6eadd08aa84ec617cfe480c3bc332f, name: winmail.dat
Aug 19 02:20:36 mail01 amavis[18837]: (18837-03) (!)Decoding of p004
(Transport Neutral Encapsulation Format) failed, leaving it unpacked:
Convert::TNEF failed: Not a TNEF attachment at (eval 106) line 1460,
<GEN16> line 1584.
Aug 19 02:20:36 mail01 amavis[18837]: (18837-03) (!)Decoding of p005
(Transport Neutral Encapsulation Format) failed, leaving it unpacked:
Convert::TNEF failed: Not a TNEF attachment at (eval 106) line 1460,
<GEN16> line 1584.
Aug 19 02:20:36 mail01 amavis[18837]: (18837-03) (!)Decoding of p006
(Transport Neutral Encapsulation Format) failed, leaving it unpacked:
Convert::TNEF failed: Not a TNEF attachment at (eval 106) line 1460,
<GEN16> line 1584.
Aug 19 02:20:36 mail01 amavis[18837]: (18837-03) (!)WARN:
files_to_scan: removing unexpected file
/var/spool/amavisd/tmp/amavis-20180819T021551-18837-KRojtkFw/parts/tnef-18837-1.doc,
it has no corresponding parts object
Aug 19 02:20:36 mail01 amavis[18837]: (18837-03) (!)WARN:
files_to_scan: removing unexpected file
/var/spool/amavisd/tmp/amavis-20180819T021551-18837-KRojtkFw/parts/tnef-18837-2.doc,
it has no corresponding parts object
Aug 19 02:20:36 mail01 amavis[18837]: (18837-03) (!)WARN:
files_to_scan: removing unexpected file
/var/spool/amavisd/tmp/amavis-20180819T021551-18837-KRojtkFw/parts/tnef-18837-3.doc,
it has no corresponding parts object