How do you configure Outlook to display all (incl. unsafe) mail attachments?
2 Answers
Microsoft describe the solution in this KB article and lists all blocked attachments here. As there is no way to say "unblock all" you need to specify every possible type that may be blocked. e.g.
Office 2007 Example (copy/paste into a .reg file)
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\Security]
"Level1Remove"=".ade;.adp;.app;.asp;.bas;.bat;.cer;.chm;.cmd;.cnt;.com;.cpl;.crt;.csh;.der;.exe;.fxp;.gadget;.hlp;.hpj;.hta;.inf;.ins;.isp;.its;.js;.jse;.ksh;.lnk;.mad;.maf;.mag;.mam;.maq;.mar;.mas;.mat;.mau;.mav;.maw;.mda;.mdb;.mde;.mdt;.mdw;.mdz;.msc;.msh;.msh1;.msh2;.mshxml;.msh1xml;.msh2xml;.msi;.msp;.mst;.ops;.osd;.pcd;.pif;.plg;.prf;.prg;.pst;.reg;.scf;.scr;.sct;.shb;.shs;.ps1;.ps1xml;.ps2;.ps2xml;.psc1;.psc2;.tmp;.url;.vb;.vbe;.vbp;.vbs;.vsmacros;.vsw;.ws;.wsc;.wsf;.wsh;.xnk;"
See this solution (http://ask-leo.com/how_do_i_force_outlook_to_open_potentially_unsafe_attachments_that_i_know_are_ok.html)
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Whilst this may theoretically answer the question, it would be preferable to include the essential parts of the answer here, and provide the link for reference.– slmJun 11, 2018 at 3:00