Yesterday I tried to upgrade sqwebmail-4.7.0 to 5.0.0 following the instructions
in the INSTALL file: I first installed courier-authlib-0.53 with

./configure make make install make install-migrate make install-configure

then installed sqwebmail-5.0.0 with

./configure --enable-unicode=BIG5,GB212,ISO-8859-15,WINDOWS-1258,EUC-CN
--enable-https --enable-softtimeout=3600 --enable-autopurge=15
--enable-cgibindir=/data/www/cgi-bin/
--enable-imagedir=/data/www/htdocs/webmail/ --with-maxargsize=20971520 make

next I did a make uninstall in the sqwebmail-4.0.7 source dir, and finished the
5.0.0 install with

make install-strip make install-configure

After starting the new authlib and sqwebmaild, all looks normal, until I want to
reply on a mail (no more message window, only a screen with an address book
scroller, and no buttons), or composing (apache internal server error). The
apache error logs records nothing while trying to reply, the mail only gets
stuck in the drafts folder, and while sending a new mail, it says "premature end
of script headers: /data/www/cgi-bin/sqwebmail".

When I send out a mail while leaving the to: field blank, it does "send" the
mail, and I get a Mailerdaemon from Postfix back.

There's no log from these errors in /var/logs/mail.log.

Jan 31 23:38:39 fldf authdaemond: modules="authuserdb authpwd authshadow
authcustom", daemons=5 Jan 31 23:38:39 fldf authdaemond: Installing libauthuserdb Jan 31 23:38:39 fldf authdaemond: Installation complete: authuserdb Jan 31 23:38:39 fldf authdaemond: Installing libauthpwd Jan 31 23:38:39 fldf authdaemond: Installation complete: authpwd Jan 31 23:38:39 fldf authdaemond: Installing libauthshadow Jan 31 23:38:39 fldf authdaemond: Installation complete: authshadow Jan 31 23:38:39 fldf authdaemond: Installing libauthcustom Jan 31 23:38:39 fldf authdaemond: Installation complete: authcustom Jan 31 23:41:56 fldf sqwebmaild: LOGIN, user=nicolas, ip=[xxx.xxx.xxx.xxx]

finally, sendit.sh has the following perms:

-rwxr-xr-x 1 root root 929 Jan 31

uninstalling sqwebmail-5.0.0 and courier-authlib-0.53, and downgrading to
sqwebmail-4.0.7 doesn't help, I keep getting the same errors.

All help is appreciated.