smtp_address_cmp does not ignore case of localpart

Hi,

in src/lib-smtp/smtp-address.c line 759 the localpart is compared with null_strcmp, which does not ignore the case. While this is the correct behavior (according to the RFC) it causes problems in real life.

In my case the vacation notices are not sent, if someone writes to First.Last@ruhr-uni-bochum.de because :addresses contains (only) first.last@ruhr-uni-bochum.de.

Regards, Andreas

-- ! AJ3630-RIPE @ RUB8-RIPE Network Operation Center ! ! Dezernat 5.I Ruhr-Universitaet Bochum ! ! The amount of energy necessary to refute bullshit is ! ! an order of magnitude bigger than to produce it. -- Alberto Brandolini !