[Pkg-exim4-users] Where to change the message size limit

[Ron Leach]

List, good afternoon,

We'd like to increase the message size limit for our Exim4 v4.80 
running under Debian Wheezy.  We do *not* use the 'split config'.

In /etc/exim4/exim4.conf.template, a comment explains that when 
MESSAGE_SIZE_LIMIT is unset, a default message size limit of 50MB is 
employed.  I am not sure where to set a different MESSAGE_SIZE_LIMIT.

As I understand it, settings can be made in file
/etc/exim4/update-exim4.conf.conf ,
but the syntax in that file seems slightly special; most of the 
parameters are preceded with 'dc_'.

Should I use the name "message_size_limit' as the name for a message 
size limit entry, preceding that name with 'dc_'?  I have in mind a 
new entry such as

dc_message_size_limit='100MB'

for example.

Our server is running live at the moment and, to avoid inadvertently 
creating problems, I'd be grateful for any advice whether that is the 
correct way to add a new parameter and whether adding this parameter 
will effect the change to Exim4's message size limit in our 
installation.  If all would be well, I expect to implement a change 
early on Sunday morning.

Regards, Ron