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gmail_as_a_relay_on_linux

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gmail_as_a_relay_on_linux [2015/11/04 18:24] – juckinsgmail_as_a_relay_on_linux [2023/06/23 10:29] – juckins
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-Directions [[http://mhawthorne.net/posts/postfix-configuring-gmail-as-relay.html|based on this page by Matthew Hawthorne]] worked: \\+===== Using Gmail as a Relay on CentOS Linux =====
  
-1. Make a backup copy of /etc/postfix/main.cf+Required packages if CentOS7 7.2.1511: \\ 
 +  * postfix (tested version 2.10.1-6.el7 ) 
 +  * ca-certificates.noarch (tested version 2015.2.4-70.0.el7_1) 
 +  * cyrus-sasl-plain (tested version 2015.2.6-70.1.el7_2) 
 +    * Got hint that this is needed from [[http://www.postfix.org/SASL_README.html#client_sasl_policy|Postfix config]] 
 +  * cyrus-sasl-lib (tested version 2.1.26-20.el7_2)
  
-2. Edit /etc/postfix/main.cf to have these settings:+Other CentOS 7 Notes: 
 +  * Best to use this version of mutt: mutt-1.6.2-1.fc22.x86_64.rpm 
 +    * Otherwise, you may get errors like: Bad IDN in "from": 'tidewater.�' 
 +  * /etc/resolv.conf may need the 'search' pattern, ex: search attlocal.net 
 +    * As root, run 'nmtui' to set network parameters 
 +  * If trouble sending after install, may need to consult [[http://unix.stackexchange.com/questions/109473/after-updating-ssmtp-to-version-2-61-i-cannot-send-mail-via-gmail|this link]] 
 + 
 +CentOS 8 Notes: 
 +  * (Nothing special noted) 
 + 
 +RockyLinux 9 Notes: 
 +  * ? 
 + 
 +Directions [[http://mhawthorne.net/posts/postfix-configuring-gmail-as-relay.html|based on this page by Matthew Hawthorne]]: \\ 
 + 
 +1. If it exists, make sure /etc/ssmtp/ssmtp.conf is the distro version with no changes 
 + 
 +2. Make a backup copy of /etc/postfix/main.cf 
 + 
 +3. Edit /etc/postfix/main.cf to have these settings:
  
 <code> <code>
-# sets gmail as relay+# Sets gmail as relay
 relayhost = [smtp.gmail.com]:587 relayhost = [smtp.gmail.com]:587
  
-#  use tls+# Use tls
 smtp_use_tls=yes smtp_use_tls=yes
  
-# use sasl when authenticating to foreign SMTP servers+# Use sasl when authenticating to foreign SMTP servers
 smtp_sasl_auth_enable = yes  smtp_sasl_auth_enable = yes 
  
-# path to password map file+# Path to password map file
 smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
  
 +# NOTE: This section *should* be configured properly in CentOS8 and RockyLinux9 by default
 # list of CAs to trust when verifying server certificate # list of CAs to trust when verifying server certificate
 #smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt #smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt
Line 23: Line 48:
 smtp_tls_CAfile = /etc/pki/tls/certs/ca-bundle.crt smtp_tls_CAfile = /etc/pki/tls/certs/ca-bundle.crt
  
-# eliminates default security options which are incompatible with Gmail+# Eliminates default security options which are incompatible with Gmail
 smtp_sasl_security_options = smtp_sasl_security_options =
  
-# add debugging+# Modify debugging
 debug_peer_list=smtp.gmail.com debug_peer_list=smtp.gmail.com
 debug_peer_level=3 debug_peer_level=3
 </code> </code>
  
-2. Add your own Gmail credentials to /etc/postfix/sasl_passwd \\+4. Add your own Gmail credentials to /etc/postfix/sasl_passwd \\
 <code> <code>
 [smtp.gmail.com]:587  username:password [smtp.gmail.com]:587  username:password
 </code> </code>
  
-3. Run the following as root: \\+5. Run the following as root: \\
 <code> <code>
 # postmap /etc/postfix/sasl_passwd # postmap /etc/postfix/sasl_passwd
 </code> </code>
  
-4. Make sure the /etc/sasl_passwd* files are owned by the postfix user: \\+6. Make sure the /etc/sasl_passwd* files are owned by the postfix user: \\
 <code> <code>
 # chown postfix sasl_passwd* # chown postfix sasl_passwd*
 </code> </code>
  
-5. Tighten permissions: \\+7. Tighten permissions: \\
 <code> <code>
 # chmod 600 sasl_passwd sasl_passwd.db # chmod 600 sasl_passwd sasl_passwd.db
 </code> </code>
  
-6. Restart postfix: \\+8. Restart postfix: \\ 
 +<code> 
 +# /bin/systemctl restart postfix.service 
 +</code> 
 +or
 <code> <code>
 # /etc/init.d/postfix reload # /etc/init.d/postfix reload
Line 60: Line 89:
 </code> </code>
  
-7. Send a test message: \\+9. Add these lines to the global /etc/Muttrc.local (easier than adding it to each user's $HOME/.muttrc): \\ 
 <code> <code>
-echo 'It works' | mailx -s 'Test message' recipient@domain.com+set from = "`whoami`@`hostname`" 
 +set realname = "`whoami`@`hostname`"
 </code> </code>
  
-8. Edit ~/.muttrc for each user as appropriate: \\ +10. Send a test message: \\ 
 +<code> 
 +mutt -s "Test1" [email protected] </dev/null 
 +</code> 
 +or to send a message without using a separate file but note mailx is probably not looking at .muttrc: 
 +<code> 
 +echo 'It works' | mailx -s 'Test message' [email protected] 
 +</code> 
 +or 
 <code> <code>
-#set from = $USER@$HOSTNAME +mailx -a test.txt -s "test subject" user@domain < /dev/null
-#set from = username@HOSTNAME_OR_ALIAS.domain +
-#set realname="juckins@lightning" +
-set realname=$USER@$HOSTNAME+
 </code> </code>
  
gmail_as_a_relay_on_linux.txt · Last modified: 2024/01/01 12:40 by juckins