Views:

IMSVA uses Postfix as Mail Transfer Agent (MTA) to relay mails. Postfix, by default, rewrites illegal mail addresses on headers for outgoing mails, if the sender IP is $mynetworks. As a result, when a mail’s recipient address in the “To:” header violates RFC 2822, Postfix will rewrite it. The result may not be expected though.

To disable address rewriting on Postfix, do the following:

  1. Use PuTTY or other software to SSH to IMSVA using root account.
  2. Run the following commands:

    postconf -e local_header_rewrite_clients=
    postfix reload

Keywords: Postfix address rewriting,mail header,mail recipient change,modified mail recipient,mail header problem,mail header issue