test.1@example.com -> mymail@example.org
test.2@example.com -> mymail@example.org
test.3@example.com -> mymail@example.org

smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
myhostname = example.com
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
mydestination = $myhostname, localhost
relayhost =
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
mailbox_size_limit = 0
recipient_delimiter = .
inet_interfaces = all
inet_protocols = all

virtual_alias_domains = example.com
virtual_alias_maps = hash:/etc/postfix/virtual
sender_canonical_maps = tcp:127.0.0.1:10001
sender_canonical_classes = envelope_sender
recipient_canonical_maps = tcp:127.0.0.1:10002
recipient_canonical_classes = envelope_recipient

@example.com mymail@example.org