To reproduce the error: in folder haraka_2_7 start haraka:

cd haraka_2_7
node_modules/Haraka/bin/haraka -c .

run swaks with the outlook email:

swaks -f [email protected] -t [email protected] -s localhost -p 2525 --data testOutlook.elm

then check the saved email:

cat quarantine/20160526/XXX

At the bottom of the html part you find:

=E1 =E9 =ED =F3 =FA =F1

which decoded is

á é í ó ú ñ

Now in haraka 2.8

cd haraka_2_8
node_modules/Haraka/bin/haraka -c .

run swaks with the outlook email:

swaks -f [email protected] -t [email protected] -s localhost -p 2525 --data testOutlook.elm

then check the saved email:

cat quarantine/20160526/XXX

At the bottom you then find

=EF=BF=BD =EF=BF=BD =EF=BF=BD =EF=BF=BD =EF=BF=BD =EF=BF=BD

which is decoded

� � � � � �