Runtime Configuration

The behaviour of these functions is affected by settings in php.ini.

Mail configuration options
NameDefaultChangeableChangelog
mail.add_x_header"0"INI_PERDIR 
mail.logNULLINI_SYSTEM|INI_PERDIR 
mail.force_extra_parametersNULLINI_SYSTEM|INI_PERDIR 
SMTP"localhost"INI_ALL 
smtp_port"25"INI_ALL 
sendmail_fromNULLINI_ALL 
sendmail_path"/usr/sbin/sendmail -t -i"INI_SYSTEM 
For further details and definitions of the INI_* modes, see the Where a configuration setting may be set.

Here's a short explanation of the configuration directives.

mail.add_x_headerbool

Add X-PHP-Originating-Script that will include UID of the script followed by the filename.

mail.logstring

The path to a log file that will log all mail() calls. Log entries include the full path of the script, line number, To address and headers.

mail.force_extra_parametersstring

Force the addition of the specified parameters to be passed as extra parameters to the sendmail binary. These parameters will always replace the value of the 5th parameter to mail().

SMTPstring

Used under Windows only: host name or IP address of the SMTP server PHP should use for mail sent with the mail() function.

smtp_portint

Used under Windows only: Number of the port to connect to the server specified with the SMTP setting when sending mail with mail(); defaults to 25.

sendmail_fromstring

Which "From:" mail address should be used in mail sent directly via SMTP (Windows only). This directive also sets the "Return-Path:" header.

sendmail_pathstring

Where the sendmail program can be found, usually /usr/sbin/sendmail or /usr/lib/sendmail. configure does an honest attempt of locating this one for you and set a default, but if it fails, you can set it here.

Systems not using sendmail should set this directive to the sendmail wrapper/replacement their mail system offers, if any. For example, » Qmail users can normally set it to /var/qmail/bin/sendmail or /var/qmail/bin/qmail-inject.

qmail-inject does not require any option to process mail correctly.

This directive works also under Windows. If set, smtp, smtp_port and sendmail_from are ignored and the specified command is executed.

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