Name: lmtp_strict_rfc2821
Type: SWITCH
Default-Value: 1
Last-Modified: 2.5.0

By default, lmtpd will be strict (per :rfc:`2821`) with regards to which
envelope addresses are allowed.  If this option is set to false, 8bit
characters in the local-part of envelope addresses are changed to 'X'
instead.  This is useful to avoid generating backscatter with certain MTAs
like Postfix or Exim which accept such messages.
