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--- lwc:linux:postfix [2025/09/16 08:23] – John Harrison
+++ lwc:linux:postfix [2025/10/20 15:40] (current) – John Harrison
@@ Line 24: / Line 24: @@
 sudo postfix stop; sudo postfix start; sudo postfix reload
 </code>
+=== Alternative allowing multiple from addresses to map to multiple to addresses (better than above solution?) ===
+from [[https://serverfault.com/questions/147921/forcing-the-from-address-when-postfix-relays-over-smtp]] (example shown):
+<code>
+/etc/postfix/main.cf:
+    smtp_generic_maps = hash:/etc/postfix/generic
+/etc/postfix/generic:
+    user@localdomain.local      account@isp.example.com
+    @localdomain.local          wholedomain@isp.example.com
+Then do:
+sudo postmap /etc/postfix/generic
+sudo /etc/init.d/postfix reload
+</code>
 === Remap root@localhost to another to address ===
   * add ''root:	       <EMAILADDR>'' to ''/etc/aliases''
@@ Line 50: / Line 65: @@
     * port 465: ''swaks --to recipient@example.com --from sender@yourdomain.com --server smtp-server --port 465 --tls-on-connect --auth-user 'your_username' --auth-password 'your_password' ''
     * port 587: ''swaks --to recipient@example.com --from sender@yourdomain.com --server smtp-server --auth-user 'your_username' --auth-password 'your_password' -p 587 --tls''
+    * //port 465 is legacy and 587 is the better choice for modern systems//