Zend> Mail> setFrom（）不做任何事情

I am using Zend Mail as follows:

$transport = new Zend_Mail_Transport_Smtp($smtpSettings['smtpServer'], $smtpSettings);

$mail = new Zend_Mail();

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.
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$mail->setFrom("support@somedomain.com", "Support");
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.
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$mail->send($transport);

I am successfully receiving the e-mail. But in place of the sender e-mail, instead of "support@somedomain.com", I am getting the G-Mail address (that I used up for SMTP configuration).

Does anyone have any idea how to fix this ?

I think the problem is that GMail SMTP server doesn't allow to send emails from @somedomain.com. You should use SMTP server installed on somedomain.com

Set
$mailInstance->clearDefaultFrom();
before
$mailInstance->setFrom($params['from'], $params['fromName']);