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CURLOPT_MAIL_FROM

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CURLOPT_MAIL_FROM(3)	referred by	curl_easy_setopt(3) \| CURLOPT_MAIL_AUTH(3) \| CURLOPT_MAIL_RCPT(3) \| CURLOPT_SASL_IR(3)
CURLOPT_MAIL_FROM(3)	refer to	CURLOPT_MAIL_AUTH(3) \| CURLOPT_MAIL_RCPT(3)