'FEATURE(smrsh)'' ''''

FEATURE(smrsh)

Use smrsh (sendmail restricted shell)

V8.7 and above

Although sendmail tries to be very safe about how it runs programs from the aliases(5) and ~/.forward files (Section 12.2.3), it still can be vulnerable to some internal attacks. To limit the selection of programs that sendmail is allowed to run, V8 sendmail includes source and documentation for the smrsh (sendmail restricted shell) program. See Section 5.8 for a full description of the smrsh program.

Chapter 1. Some Basics

Part I: Build and Install

Chapter 2. Build and Install sendmail

Chapter 3. Tune sendmail with Compile-Time Macros

Chapter 4. Configure sendmail.cf with m4

4.1 The m4 Preprocessor

4.2 Configure with m4

4.3 m4 Macros by Function

4.4 Masquerading

4.6 UUCP Support

4.8 Configuration File Feature Reference

''FEATURE(accept_unqualified_senders)'' '''

''FEATURE(accept_unresolvable_domains)'' '''

''FEATURE(access_db)'' '''

''FEATURE(allmasquerade)'' '''

''FEATURE(always_add_domain)'' '''

''FEATURE(authinfo)'' '''

''FEATURE(bestmx_is_local)'' '''

''FEATURE(bitdomain)'' '''

''FEATURE(blacklist_recipients)'' '''

''FEATURE(compat_check)'' '''

''FEATURE(delay_checks)'' '''

''FEATURE(dnsbl)'' '''

''FEATURE(domaintable)'' '''

'FEATURE(enhdnsbl)'' ''''

''FEATURE(generics_entire_domain)'' '''

''FEATURE(genericstable)'' '''

''FEATURE(ldap_routing)'' '''

''FEATURE(limited_masquerade)'' '''

''FEATURE(local_lmtp)'' '''

''FEATURE(local_no_masquerade)'' '''

''FEATURE(local_procmail)'' '''

'FEATURE(lookupdotdomain)'' ''''

'FEATURE(loose_relay_check)'' ''''

''FEATURE(mailertable)'' '''

''FEATURE(masquerade_entire_domain)'' '''

''FEATURE(masquerade_envelope)'' '''

''FEATURE(msp)'' '''

''FEATURE(nocanonify)'' '''

''FEATURE(nodns)'' '''

''FEATURE(no_default_msa)'' '''

''FEATURE(notsticky)'' '''

''FEATURE(nouucp)'' '''

''FEATURE(nullclient)'' '''

'FEATURE(promiscuous_relay)'' ''''

'FEATURE(preserve_local_plus_detail)'' ''''

''FEATURE(preserve_luser_host)'' '''

''FEATURE(queuegroup)'' '''

''FEATURE(rbl)'' '''

''FEATURE(redirect)'' '''

'FEATURE(relay_based_on_MX)'' ''''

'FEATURE(relay_entire_domain)'' ''''

'FEATURE(relay_hosts_only)'' ''''

'FEATURE(relay_local_from)'' ''''

'FEATURE(relay_mail_from)'' ''''

'FEATURE(smrsh)'' ''''

''FEATURE(stickyhost)'' '''

''FEATURE(use_ct_file)'' '''

''FEATURE(use_cw_file)'' '''

''FEATURE(uucpdomain)'' '''

''FEATURE(virtuser_entire_domain)'' '''

''FEATURE(virtusertable)'' '''

Chapter 5. Build and Use Companion Programs

Part II: Administration

Part III: The Configuration File