Syslog messages are formatted incorrectly. They include line-ending characters, but should not.
With Management -> System Log -> Log Settings set to enable, log messages are sent to the remote syslog port (514). "More client detail" is also set.
Wireshark confirms that the log messages are terminated with <cr><lf> (015,012). This is incorrect. RFC3164 states that the messages are delimited by their length, not by an embedded character.
The extra characters are stored into log files by the syslog daemons, which confuses some parsers and can make the files hard for humans to read.
Please stop including them.
You can use Wireshark to show that other log sources do not use <cr><lf> terminators.
Note that "Enable auto mail" is not set. In an e-mail message, the <cr><lf> delimiters are required.