CentOS 8.x postfix rewrite sender address on outgoing email

Replace only email address and not the sender name

If you want to replace only outgoing email address without changing the display name use following in /etc/postfix/main.cf:

  sender_canonical_maps = static:no-reply@<FQDN>

To replace outgoing (from) address on outgoing email with a desired display name use:

Create file =/etc/postfix/header_checks= with following content:

/^From:[[:space:]]+(.*)/ REPLACE From: "Your Name" <email@company.com>

Configure postfix to use above configuration using:

cd /etc/postfix
postmap header_checks
postconf -e 'smtp_header_checks = regexp:/etc/postfix/header_checks'
service postfix reload

Refer: