I have just setup sendmail on a redhat9 server. I can use webmin to send and recive emails. So I know sendmail is working right. However, SquirrelMail version 1.2.11 gives me the error: There was an error contacting the mail server.
Contact your administrator for help.

Can anyone tell me what is going on? or if there is a error file I can past here? Also, Outlook can connect to the server, but when you enter your password, it says "Server caused disconnection". Anyone have any ideas?
Thanks Randy

I've had better luck changing the settings for SquirrelMail to use smtp instead of sendmail to send mail.

I have looked in my config.php file, can you tell me if this is correct please? I am new to this, sorry if I am slow.

[root@webserv squirrelmail]# vi config.php
<?php

/**
* SquirrelMail Configuration File
* Default configuration for Red Hat Linux.
* $Id: config.php.rh7,v 1.1.2.3 2002/09/14 22:09:47 graf25 Exp $
*/

$config_version = '1.2.0';
$config_use_color = 2;

$org_name = "SquirrelMail";
$org_logo = '../images/sm_logo.png';
$org_logo_width = 308;
$org_logo_height = 111;
$org_title = "SquirrelMail $version";
$signout_page = '';
$frame_top = '_top';

$motd = "";

$squirrelmail_default_language = 'en_US';

$imapServerAddress = 'localhost';
$imapPort = 143;
$useSendmail = true;
$smtpServerAddress = 'mail.oasisone.org';
$smtpPort = 25;
$sendmail_path = '/usr/sbin/sendmail';
$use_authenticated_smtp = false;
$pop_before_smtp = false;
$imap_server_type = 'uw';
$invert_time = false;
$optional_delimiter = 'detect';

$default_folder_prefix = 'mail/';
$trash_folder = 'Trash';
$sent_folder = 'Sent';
$draft_folder = 'Drafts';
$default_move_to_trash = true;
$default_move_to_sent = true;
$default_save_as_draft = true;
$show_prefix_option = true;
$list_special_folders_first = true;
$use_special_folder_color = true;
$auto_expunge = true;
$auto_expunge = true;
$default_sub_of_inbox = true;
$show_contain_subfolders_option = false;
$default_unseen_notify = 2;
$default_unseen_type = 1;
$auto_create_special = true;
$delete_folder = false;

$default_charset = 'iso-8859-1';
$data_dir = '/var/lib/squirrelmail/prefs/';
$attachment_dir = "/var/spool/squirrelmail/attach/";
$dir_hash_level = 0;
$default_left_size = '150';
$force_username_lowercase = false;
$default_use_priority = true;
$hide_sm_attributions = false;
$default_use_mdn = true;
$edit_identity = true;
$edit_name = true;
$allow_thread_sort = true;
$allow_server_sort = true;

$plugins[0] = 'delete_move_next';
$plugins[1] = 'squirrelspell';
$plugins[2] = 'newmail';

$theme_css = '';
$theme[0]['PATH'] = '../themes/default_theme.php';
$theme[0]['NAME'] = 'Default';
$theme[1]['PATH'] = '../themes/plain_blue_theme.php';
$theme[1]['NAME'] = 'Plain Blue';
$theme[2]['PATH'] = '../themes/sandstorm_theme.php';
$theme[2]['NAME'] = 'Sand Storm';
$theme[3]['PATH'] = '../themes/deepocean_theme.php';
$theme[3]['NAME'] = 'Deep Ocean';
$theme[4]['PATH'] = '../themes/slashdot_theme.php';
$theme[4]['NAME'] = 'Slashdot';
$theme[5]['PATH'] = '../themes/purple_theme.php';
$theme[5]['NAME'] = 'Purple';
$theme[6]['PATH'] = '../themes/forest_theme.php';
$theme[6]['NAME'] = 'Forest';
$theme[7]['PATH'] = '../themes/ice_theme.php';
$theme[7]['NAME'] = 'Ice';
$theme[8]['PATH'] = '../themes/seaspray_theme.php';
$theme[8]['NAME'] = 'Sea Spray';
$theme[9]['PATH'] = '../themes/bluesteel_theme.php';
$theme[10]['PATH'] = '../themes/dark_grey_theme.php';
$theme[10]['NAME'] = 'Dark Grey';
$theme[11]['PATH'] = '../themes/high_contrast_theme.php';
$theme[11]['NAME'] = 'High Contrast';
$theme[12]['PATH'] = '../themes/black_bean_burrito_theme.php';
$theme[12]['NAME'] = 'Black Bean Burrito';
$theme[13]['PATH'] = '../themes/servery_theme.php';
$theme[13]['NAME'] = 'Servery';
$theme[14]['PATH'] = '../themes/maize_theme.php';
$theme[14]['NAME'] = 'Maize';
$theme[15]['PATH'] = '../themes/bluesnews_theme.php';
$theme[15]['NAME'] = 'BluesNews';
$theme[16]['PATH'] = '../themes/deepocean2_theme.php';
$theme[16]['NAME'] = 'Deep Ocean 2';
$theme[17]['PATH'] = '../themes/blue_grey_theme.php';
$theme[17]['NAME'] = 'Blue Grey';
$theme[18]['PATH'] = '../themes/dompie_theme.php';
$theme[18]['NAME'] = 'Dompie';
$theme[19]['PATH'] = '../themes/methodical_theme.php';
$theme[19]['NAME'] = 'Methodical';
$theme[20]['PATH'] = '../themes/greenhouse_effect.php';
$theme[20]['NAME'] = 'Greenhouse Effect (Changes)';
$theme[21]['PATH'] = '../themes/in_the_pink.php';
$theme[21]['NAME'] = 'In The Pink (Changes)';
$theme[22]['PATH'] = '../themes/kind_of_blue.php';
$theme[22]['NAME'] = 'Kind of Blue (Changes)';
$theme[23]['PATH'] = '../themes/monostochastic.php';
$theme[23]['NAME'] = 'Monostochastic (Changes)';
$theme[24]['PATH'] = '../themes/shades_of_grey.php';
$theme[24]['NAME'] = 'Shades of Grey (Changes)';
$theme[25]['PATH'] = '../themes/spice_of_life.php';
$theme[25]['NAME'] = 'Spice of Life (Changes)';
$theme[26]['PATH'] = '../themes/spice_of_life_lite.php';
$theme[26]['NAME'] = 'Spice of Life - Lite (Changes)';
$theme[27]['PATH'] = '../themes/spice_of_life_dark.php';
$theme[27]['NAME'] = 'Spice of Life - Dark (Changes)';
$theme[28]['PATH'] = '../themes/christmas.php';
$theme[28]['NAME'] = 'Holiday - Christmas';
$theme[29]['PATH'] = '../themes/darkness.php';
$theme[29]['NAME'] = 'Darkness (Changes)';
$theme[30]['PATH'] = '../themes/random.php';
$theme[30]['NAME'] = 'Random (Changes every login)';
$theme[31]['PATH'] = '../themes/midnight.php';
$theme[31]['NAME'] = 'Midnight';
$theme[32]['PATH'] = '../themes/alien_glow.php';
$theme[32]['NAME'] = 'Alien Glow';
$theme[33]['PATH'] = '../themes/dark_green.php';
$theme[33]['NAME'] = 'Dark Green';
$theme[34]['PATH'] = '../themes/penguin.php';
$theme[34]['NAME'] = 'Penguin';
$theme[35]['PATH'] = '../themes/saloon.php';
$theme[35]['NAME'] = 'Saloon';


$default_use_javascript_addr_book = false;
$addrbook_dsn = '';
$addrbook_table = 'address';

$prefs_dsn = '';
$prefs_table = 'userprefs';
$prefs_user_field = 'user';
$prefs_key_field = 'prefkey';
$prefs_val_field = 'prefval';

/**
* Make sure there are no characters after the PHP closing
* tag below (including newline characters and whitespace).
* Otherwise, that character will cause the headers to be
* sent and regular output to begin, which will majorly screw
* things up when we try to send more headers later.
*/
?>

I believe in the code block below from your config file; you will want to change the highlighted portion I made to have useSendmail = false instead of true

Everything else from what I can tell looks ok.

You should be able to run the config script to configure the settings though, makes it a little easier to change, etc.

Thanks, works great now!