[exim] gecos_name

hi,
i move to a new server and wanted to reuse my exim4.conf but some things
does not work as expected:

when local_transport i see in sender
 Me <sysuser@local_domain>               # here Me should be sysuser or
full name

when remote_transport i see
 sysuser <full.name@official_domain>    # hier sysuser should be full name

gecos_pattern = ^([^,:]*)    # i added the : (but works without on old
server)
gecos_name = $1

gecos field in /etc/passwd are correct.

thanks in advance
andreas