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<?php
/*
* This file is part of SwiftMailer.
* (c) 2018 Christian Schmidt
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
/**
* An ESMTP handler for 8BITMIME support (RFC 6152).
*
* 8BITMIME is required when sending 8-bit content to over SMTP, e.g. when using
* Swift_Mime_ContentEncoder_PlainContentEncoder in "8bit" mode.
*
* 8BITMIME mode is enabled unconditionally, even when sending ASCII-only
* messages, so it should only be used with an outbound SMTP server that will
* convert the message to 7-bit MIME if the next hop does not support 8BITMIME.
*
* @author Christian Schmidt
*/
class Swift_Transport_Esmtp_EightBitMimeHandler implements Swift_Transport_EsmtpHandler
{
protected $encoding;
/**
* @param string $encoding The parameter so send with the MAIL FROM command;
* either "8BITMIME" or "7BIT"
*/
public function __construct(string $encoding = '8BITMIME')
{
$this->encoding = $encoding;
}
/**
* Get the name of the ESMTP extension this handles.
*
* @return string
*/
public function getHandledKeyword()
{
return '8BITMIME';
}
/**
* Not used.
*/
public function setKeywordParams(array $parameters)
{
}
/**
* Not used.
*/
public function afterEhlo(Swift_Transport_SmtpAgent $agent)
{
}
/**
* Get params which are appended to MAIL FROM:<>.
*
* @return string[]
*/
public function getMailParams()
{
return ['BODY='.$this->encoding];
}
/**
* Not used.
*/
public function getRcptParams()
{
return [];
}
/**
* Not used.
*/
public function onCommand(Swift_Transport_SmtpAgent $agent, $command, $codes = [], &$failedRecipients = null, &$stop = false)
{
}
/**
* Returns +1, -1 or 0 according to the rules for usort().
*
* This method is called to ensure extensions can be execute in an appropriate order.
*
* @param string $esmtpKeyword to compare with
*
* @return int
*/
public function getPriorityOver($esmtpKeyword)
{
return 0;
}
/**
* Not used.
*/
public function exposeMixinMethods()
{
return [];
}
/**
* Not used.
*/
public function resetState()
{
}
}
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