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Trying to understand string variables in Postfix configuration, is this what's happening?
Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern)
Come Celebrate our 10 Year Anniversary!Installing postfix hangs at Postfix Configuration Screen?Postfix configuration (relay access)Postfix Configurationpostfix bounce configurationtrying to setup relay using PostfixPostfix configuration;Postfix postmap: fatal: bad string length 137 >1:postfix suddenly failed to expand mail aliasesPostfix configuration CentOS 7Postfix trying to deliver remote aliases locally
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So, I've jumped in head first into Postfix for the first time through Virtualmin / Webmin on Ubuntu 16.04.
In the main.cf file, there are entries like:
mydestination = localhost, localhost.$mydomain, $myhostname, $mydomain
I am making an assumption here, but I believe the reason we use the $variables is to maintain a proper configuration should any of those values change, thereby keeping the mail server on target.
would the above yield the following:
mydestination = localhost, localhost.mydomain.com, server1, server1.mydomain.com
And finally, how do I validate the values that should be inserted into those variables?
postfix
asked Apr 9 at 19:59
Jon GriffithJon Griffith
63
add a comment |
So, I've jumped in head first into Postfix for the first time through Virtualmin / Webmin on Ubuntu 16.04.
In the main.cf file, there are entries like:
mydestination = localhost, localhost.$mydomain, $myhostname, $mydomain
I am making an assumption here, but I believe the reason we use the $variables is to maintain a proper configuration should any of those values change, thereby keeping the mail server on target.
would the above yield the following:
mydestination = localhost, localhost.mydomain.com, server1, server1.mydomain.com
And finally, how do I validate the values that should be inserted into those variables?
postfix
asked Apr 9 at 19:59
Jon GriffithJon Griffith
63
add a comment |
So, I've jumped in head first into Postfix for the first time through Virtualmin / Webmin on Ubuntu 16.04.
In the main.cf file, there are entries like:
mydestination = localhost, localhost.$mydomain, $myhostname, $mydomain
I am making an assumption here, but I believe the reason we use the $variables is to maintain a proper configuration should any of those values change, thereby keeping the mail server on target.
would the above yield the following:
mydestination = localhost, localhost.mydomain.com, server1, server1.mydomain.com
And finally, how do I validate the values that should be inserted into those variables?
postfix
asked Apr 9 at 19:59
Jon GriffithJon Griffith
63
So, I've jumped in head first into Postfix for the first time through Virtualmin / Webmin on Ubuntu 16.04.
In the main.cf file, there are entries like:
mydestination = localhost, localhost.$mydomain, $myhostname, $mydomain
I am making an assumption here, but I believe the reason we use the $variables is to maintain a proper configuration should any of those values change, thereby keeping the mail server on target.
would the above yield the following:
mydestination = localhost, localhost.mydomain.com, server1, server1.mydomain.com
And finally, how do I validate the values that should be inserted into those variables?
postfix
postfix
asked Apr 9 at 19:59
Jon GriffithJon Griffith
63
asked Apr 9 at 19:59
Jon GriffithJon Griffith
63
asked Apr 9 at 19:59
Jon GriffithJon Griffith
63
asked Apr 9 at 19:59
Jon GriffithJon Griffith
63
asked Apr 9 at 19:59
Jon GriffithJon Griffith
63
63
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
You can use the postconf command to see the default values (postconf -d) and current (custom) values of postfix variables (postconf -n)
http://www.postfix.org/postconf.5.html
The general format of the main.cf file is as follows:
Each logical line is in the form
parameter = value. Whitespace around the "=" is ignored, as is whitespace at the end of a logical line.
...
A parameter value may refer to other parameters.
The expressions "$name" and "$name" are recursively replaced with the value of the named parameter. ... An undefined parameter value is replaced with the empty value.
When the same parameter is defined multiple times, only the last instance is remembered.
Otherwise, the order of main.cf parameter definitions does not matter.
Your assumption that
mydestination = localhost, localhost.$mydomain, $myhostname, $mydomain
would yield the following:
mydestination = localhost, localhost.mydomain.com, server1, server1.mydomain.com
Is only true when either somewhere in your configuration file those parameters have been specifically set or when server1.mydomain.com is the actual hostname of your server. See the manual for myhostname and mydomain
answered Apr 9 at 20:38
HBruijnHBruijn
56.4k1190150
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You can use the postconf command to see the default values (postconf -d) and current (custom) values of postfix variables (postconf -n)
http://www.postfix.org/postconf.5.html
The general format of the main.cf file is as follows:
Each logical line is in the form
parameter = value. Whitespace around the "=" is ignored, as is whitespace at the end of a logical line.
...
A parameter value may refer to other parameters.
The expressions "$name" and "$name" are recursively replaced with the value of the named parameter. ... An undefined parameter value is replaced with the empty value.
When the same parameter is defined multiple times, only the last instance is remembered.
Otherwise, the order of main.cf parameter definitions does not matter.
Your assumption that
mydestination = localhost, localhost.$mydomain, $myhostname, $mydomain
would yield the following:
mydestination = localhost, localhost.mydomain.com, server1, server1.mydomain.com
Is only true when either somewhere in your configuration file those parameters have been specifically set or when server1.mydomain.com is the actual hostname of your server. See the manual for myhostname and mydomain
answered Apr 9 at 20:38
HBruijnHBruijn
56.4k1190150
add a comment |
You can use the postconf command to see the default values (postconf -d) and current (custom) values of postfix variables (postconf -n)
http://www.postfix.org/postconf.5.html
The general format of the main.cf file is as follows:
Each logical line is in the form
parameter = value. Whitespace around the "=" is ignored, as is whitespace at the end of a logical line.
...
A parameter value may refer to other parameters.
The expressions "$name" and "$name" are recursively replaced with the value of the named parameter. ... An undefined parameter value is replaced with the empty value.
When the same parameter is defined multiple times, only the last instance is remembered.
Otherwise, the order of main.cf parameter definitions does not matter.
Your assumption that
mydestination = localhost, localhost.$mydomain, $myhostname, $mydomain
would yield the following:
mydestination = localhost, localhost.mydomain.com, server1, server1.mydomain.com
Is only true when either somewhere in your configuration file those parameters have been specifically set or when server1.mydomain.com is the actual hostname of your server. See the manual for myhostname and mydomain
answered Apr 9 at 20:38
HBruijnHBruijn
56.4k1190150
add a comment |
You can use the postconf command to see the default values (postconf -d) and current (custom) values of postfix variables (postconf -n)
http://www.postfix.org/postconf.5.html
The general format of the main.cf file is as follows:
Each logical line is in the form
parameter = value. Whitespace around the "=" is ignored, as is whitespace at the end of a logical line.
...
A parameter value may refer to other parameters.
The expressions "$name" and "$name" are recursively replaced with the value of the named parameter. ... An undefined parameter value is replaced with the empty value.
When the same parameter is defined multiple times, only the last instance is remembered.
Otherwise, the order of main.cf parameter definitions does not matter.
Your assumption that
mydestination = localhost, localhost.$mydomain, $myhostname, $mydomain
would yield the following:
mydestination = localhost, localhost.mydomain.com, server1, server1.mydomain.com
Is only true when either somewhere in your configuration file those parameters have been specifically set or when server1.mydomain.com is the actual hostname of your server. See the manual for myhostname and mydomain
answered Apr 9 at 20:38
HBruijnHBruijn
56.4k1190150
You can use the postconf command to see the default values (postconf -d) and current (custom) values of postfix variables (postconf -n)
http://www.postfix.org/postconf.5.html
The general format of the main.cf file is as follows:
Each logical line is in the form
parameter = value. Whitespace around the "=" is ignored, as is whitespace at the end of a logical line.
...
A parameter value may refer to other parameters.
The expressions "$name" and "$name" are recursively replaced with the value of the named parameter. ... An undefined parameter value is replaced with the empty value.
When the same parameter is defined multiple times, only the last instance is remembered.
Otherwise, the order of main.cf parameter definitions does not matter.
Your assumption that
mydestination = localhost, localhost.$mydomain, $myhostname, $mydomain
would yield the following:
mydestination = localhost, localhost.mydomain.com, server1, server1.mydomain.com
Is only true when either somewhere in your configuration file those parameters have been specifically set or when server1.mydomain.com is the actual hostname of your server. See the manual for myhostname and mydomain
answered Apr 9 at 20:38
HBruijnHBruijn
56.4k1190150
answered Apr 9 at 20:38
HBruijnHBruijn
56.4k1190150
answered Apr 9 at 20:38
HBruijnHBruijn
56.4k1190150
answered Apr 9 at 20:38
HBruijnHBruijn
56.4k1190150
56.4k1190150
add a comment |
add a comment |
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