Pretty sure the following contraption in the postinst script is responsible:
36 echo "$RET" | sed -r -e ':a s/(\[[^]:]*):/\1=/; ta' \ 37 -e 's/[[:space:]]*:[[:space:]]*/\n/g' \ 38 -e ':b s/(\[[^]=]*)=/\1:/; tb' \ 39 -e 's/[][]//g' > /etc/nullmailer/remotes
Unfortunately I am not completely sure what happens here (and what could possibly removed or fixed).
Jörg
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