Default line length is 72

config/main.inc.php.dist

@@ -216,7 +216,7 @@ $rcmail_config['mail_header_delimiter'] = NULL;
 
 // number of chars allowed for line when wrapping text.
 // text wrapping is done when composing/sending messages
-$rcmail_config['line_length'] = 66;
+$rcmail_config['line_length'] = 72;
 
 // send plaintext messages as format=flowed
 $rcmail_config['send_format_flowed'] = true;

program/steps/mail/sendmail.inc

@@ -396,7 +396,7 @@ if (!$savedraft) {
 }
 
 // set line length for body wrapping
-$LINE_LENGTH = $RCMAIL->config->get('line_length', 75);
+$LINE_LENGTH = $RCMAIL->config->get('line_length', 72);
 
 // Since we can handle big messages with disk usage, we need more time to work
 @set_time_limit(0);