1b38a18473
Exim 4.95 on Ubuntu Jammy started enforcing an outbound line length limit of 998 bytes, easily exceeded by some badly-behaved MUAs. Unfortunately, because Exim only checks this in its remote_smtp transport, it results in mass bounces back for Mailman mailing lists, incrementing all subscribers bounce scores on lists where bounce processing is enabled. The telltale indicator is that the messages are returned to Mailman citing a delivery error of "message has lines too long for transport". Ubuntu added a workaround in later versions of their packages, but did not backport that to Jammy. Regardless, it's overridden by a config option and we replace the default Exim config entirely, so need to incorporate it into ours directly anyway. Because this message_linelength_limit option to the remote_smtp transport is only supported by exim versions on Jammy and newer, exclude it for our older platforms so that it won't result in a configuration loading error. This copies the override value used in Ubuntu Noble's exim4.conf.template file. Change-Id: I38e169dc14e7fc3c5c1d43b5f147e6b35b718bb2
Installs and configures the exim mail server
Role Variables