1 Topic by umashankerp

  • umashankerp
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  • Registered: 2011-02-07
  • Posts: 31

Topic: How to block certain file types from uploading.

In the iredmail 0.6.1, all types of files are getting uploaded through web mail client. I would like to block certain file types like .exe, .dll,vbs etc. from uploading.
They should not get uploaded even they are in zipped form.
I would also like to block double file extensions which carry viruses like <name>.doc.exe,<name>.xls.dll etcc.
Is is possible ?

Please help me.

UMA SHANKER P.

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Spider Email Archiver: On-Premises, lightweight email archiving software developed by iRedMail team. Supports Amazon S3 compatible storage and custom branding.

2 Reply by ZhangHuangbin

  • ZhangHuangbin
  • ZhangHuangbin
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  • Registered: 2009-05-06
  • Posts: 31,141

Re: How to block certain file types from uploading.

Amavisd can do this for you, search "$banned_filename_re" in amavisd.conf first.

Reference:
http://www.faqforge.com/linux/controlpa … pconfig-3/
http://www200.pair.com/mecham/spam/bypassing.html (Search "banned_filename_re" in this page)

3 Reply by umashankerp

  • umashankerp
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  • Posts: 31

Re: How to block certain file types from uploading.

Thanks for the help.
Is it necessary to modify both main.cf and amavisd.conf or only amavisd.conf is sufficient ?
pls clarify me

4 Reply by ZhangHuangbin

  • ZhangHuangbin
  • ZhangHuangbin
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  • Registered: 2009-05-06
  • Posts: 31,141

Re: How to block certain file types from uploading.

Either is ok.