Thanks a lot. On Wed, Dec 14, 2022 at 3:27 PM Wietse Venema <wie...@porcupine.org> wrote:
> Tan Mientras: > > Hello > > > > Excuse my generic question, but I dont know where to start > > *Is it possible to filter/detect/forbid mails containing invoice.exe as > > attachment at postfix level?* > > An example from https://www.postfix.org/header_checks.5.html > > /etc/postfix/main.cf: > header_checks = pcre:/etc/postfix/header_checks.pcre > > /etc/postfix/header_checks.pcre: > /^Content-(Disposition|Type).*name\s*=\s*"?([^;]*(\.|=2E)( > ade|adp|asp|bas|bat|chm|cmd|com|cpl|crt|dll|exe| > hlp|ht[at]| > inf|ins|isp|jse?|lnk|md[betw]|ms[cipt]|nws| > \{[[:xdigit:]]{8}(?:-[[:xdigit:]]{4}){3}-[[:xdigit:]]{12}\}| > ops|pcd|pif|prf|reg|sc[frt]|sh[bsm]|swf| > vb[esx]?|vxd|ws[cfh]))(\?=)?"?\s*(;|$)/x > REJECT Attachment name "$2" may not end with ".$4" > >
