[imp] Error sending mail OpenBSD 3.9 IMP

[Stephen Strand]

Before I even begin, here is what I am running:

OpenBSD 3.9
PHP 5.04
    - PHP5-IMAP
    - PHP5-LDAP
    - PHP-MCRYPT
    - PHP-CURL
    - And every other PHP package listed in the PHP5 packages for 
OpenBSD 3.9
Apache 1.3.29, mod_ssl 2.8.16, DSO support (+ patches)
Dovecot 1.0 beta3
Postfix 2.3.20060207

My mail system is working just fine. I can send/recieve, it all works. I 
decided to give IMP/Horde a try. I setup the system per the instructions 
set forth by IMP from the documentation. IMP works just fine except for 
the ability to send email. I have tried using the sendmail binary, and 
external SMTP servers all with the same result. After doing some poking 
around, I found these errors being generated by Apache in the error log 
files:

[Fri May 12 06:50:56 2006] [error] PHP Fatal error:  
IMP::expandAddresses() [<a 
href='function.require'>function.require</a>]: Failed opening required 
'Mail/RFC822.php' 
(include_path='/var/www/horde/lib:.:/pear/lib:/var/www/pear/lib') in 
/var/www/horde/imp/lib/IMP.php on line 357
[Fri May 12 06:50:59 2006] [error] PHP Warning:  
IMP_Compose::sendMessage(Mail.php) [<a 
href='function.sendMessage'>function.sendMessage</a>]: failed to open 
stream: No such file or directory in /var/www/horde/imp/lib/Compose.php 
on line 82
[Fri May 12 06:50:59 2006] [error] PHP Fatal error:  
IMP_Compose::sendMessage() [<a 
href='function.require'>function.require</a>]: Failed opening required 
'Mail.php' 
(include_path='/var/www/horde/lib:.:/pear/lib:/var/www/pear/lib') in 
/var/www/horde/imp/lib/Compose.php on line 82
[Fri May 12 06:52:17 2006] [error] [client 216.120.134.62] File does not 
exist: /var/www/htdocs/horde/index.php

No matter what method of sending mail I choose, it will always generate 
these errors. What is even more perplexing is that I did a search for 
Mail.php and RFC822.php on the local filesystem and came up with zero 
results. These files just don't exist. Has anyone else had this issue? 
Any ideas as to what is going on. Thanks in advance.

-- 
Stephen Strand

email: steve.strand at gmail.com
cell: 616.724.6235