https://www.vanderschaft.net/mediawiki/index.php?action=history&feed=atom&title=Postmap_for_relaying_mails 2026-09-12T05:11:45Z Bewerkingsoverzicht voor deze pagina op de wiki MediaWiki 1.45.4 https://www.vanderschaft.net/mediawiki/index.php?title=Postmap_for_relaying_mails&diff=32&oldid=prev 2026-03-19T06:34:18Z

<p>Nieuwe pagina aangemaakt met &#039;To configure Postfix to use a relay password, create a sasl_passwd file, hash it with postmap, and set permissions. Use [smtp.example.com]:587 username:password in /etc/postfix/sasl_passwd, then run: sudo postmap /etc/postfix/sasl_passwd sudo chown root:root /etc/postfix/sasl_passwd* sudo chmod 0600 /etc/postfix/sasl_passwd*. Steps to Configure Postfix Relay Password: Create/Edit Password File: Create a file named /etc/postfix/sasl_passwd and add your…&#039;</p> <p><b>Nieuwe pagina</b></p><div>To configure Postfix to use a relay password,<br /> create a sasl_passwd file, hash it with postmap, and set permissions. <br /> Use [smtp.example.com]:587 username:password in /etc/postfix/sasl_passwd, then run:<br /> <br /> sudo postmap /etc/postfix/sasl_passwd<br /> sudo chown root:root /etc/postfix/sasl_passwd*<br /> sudo chmod 0600 /etc/postfix/sasl_passwd*. <br /> <br /> Steps to Configure Postfix Relay Password:<br /> <br /> Create/Edit Password File: Create a file named /etc/postfix/sasl_passwd and add your relay server credentials:<br /> <br /> <br /> sudo nano /etc/postfix/sasl_passwd<br /> <br /> Add the following line, replacing with your relay server&#039;s address, port, username, and password:<br /> <br /> <br /> [smtp.provider.com]:587 username@domain.com:password<br /> <br /> Generate Hash Database: Run postmap to convert the text file into a format Postfix can read:<br /> <br /> <br /> sudo postmap /etc/postfix/sasl_passwd<br /> <br /> This creates a sasl_passwd.db file in the same directory.<br /> Secure the File: Because this file contains plaintext credentials, restrict access to only the root user:<br /> <br /> <br /> sudo chown root:root /etc/postfix/sasl_passwd /etc/postfix/sasl_passwd.db<br /> sudo chmod 0600 /etc/postfix/sasl_passwd /etc/postfix/sasl_passwd.db<br /> <br /> Configure Main.cf: Ensure your /etc/postfix/main.cf is configured to use the password file:<br /> <br /> <br /> smtp_sasl_auth_enable = yes<br /> smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd<br /> smtp_sasl_security_options = noanonymous<br /> smtp_use_tls = yes<br /> relayhost = [smtp.provider.com]:587<br /> <br /> Restart Postfix: Reload Postfix to apply the changes<br /> <br /> sudo systemctl restart postfix</div>

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