sending mail on ubuntu through sendmail
dave at thefletchers.net
Wed Oct 20 10:21:10 UTC 2010
These are my notes for getting my postfix working:-
sudo aptitude install postfix
Select the option for sending mail out plus receiving using fetchmail
(internet with smarthost).
To set up the sasl stuff (database for auth SMTP passwords) create the file
containing (in my case) the line
auth.smtp.example.com mymailboxID at example.com:mypassword
sudo chown root:root /etc/postfix/sasl/sasl_passwd
sudo chmod 600 /etc/postfix/sasl/sasl_passwd
Convert it to the required database format:-
sudo postmap hash:/etc/postfix/sasl/sasl_passwd
Add the line
home_mailbox = Maildir/
if maildir is wanted - recommended. This creates a Maildir in each user's home
directory when messages for the user are received.
Change the relayhost line to, in my case,
relayhost = auth.smtp.example.com
Change the mynetworks line to
mynetworks = 192.168.2.0/24 localhost
message_size_limit = 0
after the mailbox_size_limit line
Add to the end of main.cf
# SASL SUPPORT FOR SERVERS
# Added by David Fletcher using the how-to found at
# The following options set parameters needed by Postfix to enable
# Cyrus-SASL support for authentication of mail servers.
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl/sasl_passwd
Edit the aliases file to deliver incoming mail to the correct boxes then
sudo postalias /etc/aliases
to build the database file.
Might have to hash out the alias_maps line.
sudo postfix reload
to start everything working.
Hope this helps get you going. If you're using the ISP SMTP service you
shouldn't need the SASL stuff but I use it because with postfix I can and I
think it's cool.
Also, the home_mailbox is for receiving mail via SMTP, so you won't really
need to worry about that either for now.
In fact I think all you need to initially do is edit the relayhost and
mynetworks lines, then do postfix reload. Play with the rest later.
PS It can be useful and reassuring to have an old, non-production computer to
play around with things like this.
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