There appears to be a difference between the way mail() works between 4.1.0 and 4.1.2.  This can cause scripts which worked perfectly in PHP 4.1.0 to take as much as a minute to excecute in PHP 4.1.2.

I upgraded using a pkg file from pkgmaster.com for a Cobalt RAQ4 server, and I have spoken to another PHP user using Redhat 7 who has experienced the same issue.

Basically PHP mail() functions were taking as long as a minute to excecute, when prior to the upgrade they took seconds.

We found that while we had no problems with PHP 4.1.0, we had to add all our IP's into the /etc/hosts file to cure the problem experienced with 4.1.2.

Config is:

System Linux rev66.cobalt 2.2.16C28_III #1 Mon Jul 30 22:07:58 PDT 2001 i586 unknown

Build Date Feb 27 2002

Configure Command  './configure' '--prefix=/usr' '--with-apxs=/usr/sbin/apxs' '--with-gd' '--with-gettext=/usr' '--enable-safe-mode' '--with-config-file-path=/etc/httpd' '--with-exec-dir=/usr/bin' '--with-zlib' '--enable-magic-quotes' '--with-regex=system' '--with-ttf' '--with-db' '--with-gdbm' '--with-mbstring' '--with-mbstr-enc-trans' '--enable-track-vars' '--enable-wddx=shared' '--enable-mm=shared' '--enable-xml' '--disable-debug' '--with-libdir=/usr/lib' '--with-db3' '--with-interbase=shared' '--with-pgsql=shared' '-- 

Although we have solved this issue by adding the IP's to the /etc/hosts file, it may be worth documenting this somewhere for others reference, it took a great deal of hair-pulling to get it solved!