Use SMTP to send emails

Introduction: This is a detailed page for sending emails using SMTP. It introduces PHP, related knowledge, skills, experience, and some PHP source code.

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$ Params = array ('smtpserver' => 'mail .xxx.com ', 'smtpauth' => '1', 'smtpuser' => 'System @ xxx.com ', 'smtppassword' => 'xxx', 'systemmailer' => 'cor Inc. ', 'systemmailaddress' => 'System @ xxx.com',); define ("mail_smtp_server", $ Params ['smtpserver']); define ("mail_auth ", $ Params ['smtpau']); define ("mail_username", $ Params ['smtpuser']); define ("mail_password", $ Params ['smtppassword']); define ('System _ Mailer ', $ Params ['systemmailer']); define ("support_email", $ Params ['systemmailaddress']); /*** send mail via SMTP ** @ Param array $ to * example array ("will" => "will@126.com") the array key value is the recipient's name, the array value is the recipient email address, which can contain multiple recipients at the same time; * @ Param string $ from_name sender name * @ Param string $ from sender email address * @ Param string $ subject Email Subject * @ Param string $ message email content note: HTML * @ Param string $ charset email encoding is supported. By default, it is specified as GBK * @ return int *. The returned value 0 indicates that the email is successfully sent. If the value is not 0, the email fails to be sent. */Function Sendmail ($ to, $ from_name, $ from, $ subject, $ message, $ charset = "GBK") {// send an email if (! $ From_name) $ from_name = system_mailer; If (! $ From) $ from = support_email; If (system_mailer & function_exists ('mail') // use the Sendmail component to send an email {$ message = str_replace ("\ r ", '', $ message); If (! Is_array ($ to) Return-7; foreach ($ to as $ key => $ email) {if ($ email) {@ mail ($ email, $ subject, $ message, "From: $ from") ;}} else // use SMTP to send an email {// return smtpsendmail ($ TMP, $ from_name, $ from, $ subject, $ message, $ charset); // mass mailing if (is_array ($ to) {foreach ($ to as $ key => $ value) {$ TMP [$ key] = $ value; If (count ($ TMP) = 10) {$ result [] = smtpsendmail ($ TMP, $ from_name, $ from, $ subject, $ message, $ charset); $ TMP = "" ;}} if ($ TMP) {Return smtpsendmail ($ TMP, $ from_name, $ from, $ subject, $ message, $ charset);} else {return array_pop ($ result );}} else {return-7 ;}} return 0;} function smtpsendmail ($ to, $ from_name, $ from, $ subject, $ message, $ charset = "GBK ") {$ SMTP = explode (":", mail_smtp_server); $ check = mail_auth; $ smtp_host = $ SMTP [0]; $ smtp_port = $ SMTP [1]? $ SMTP [1]: 25; $ mail_debug = $ globals ['queue _ debug']; if ($ check) {$ username = mail_username; $ Password = mail_password ;} $ s_from = support_email; $ fp = @ fsockopen ($ smtp_host, $ smtp_port, $ errno, $ errstr, 10); If (! $ FP) Return-1; if (function_exists ("stream_set_blocking") {stream_set_blocking ($ FP, true);} else {set_socket_blocking ($ FP, true );} stream_set_timeout ($ FP, 10); $ lastmessage = fgets ($ FP, 512); // if ($ mail_debug) {echo $ lastmessage. "\ r \ n";} If (substr ($ lastmessage, 0, 3 )! = 220) Return-1; $ yourname = "yourname"; if ($ check = "1") $ lastact = "HELO ". $ yourname. "\ r \ n"; else $ lastact = "HELO ". $ yourname. "\ r \ n"; fputs ($ FP, $ lastact); $ lastmessage = fgets ($ FP, 512); // if ($ mail_debug) {echo $ lastact; echo $ lastmessage;} If (substr ($ lastmessage, 0, 3 )! = 220) Return-2; if ($ check = "1") {$ lastact = "auth login ". "\ r \ n"; fputs ($ FP, $ lastact); $ lastmessage = fgets ($ FP, 512); // if ($ mail_debug) {echo $ lastact; echo $ lastmessage;} If (substr ($ lastmessage, 0, 3 )! = 334) Return-3; $ lastact = base64_encode ($ username ). "\ r \ n"; fputs ($ FP, $ lastact); $ lastmessage = fgets ($ FP, 512); // if ($ mail_debug) {echo $ lastact; echo $ lastmessage;} If (substr ($ lastmessage, 0, 3 )! = 334) Return-4; $ lastact = base64_encode ($ password ). "\ r \ n"; fputs ($ FP, $ lastact); $ lastmessage = fgets ($ FP, 512); // if ($ mail_debug) {echo $ lastact; echo $ lastmessage;} If (substr ($ lastmessage, 0, 3 )! = "235") Return-5 ;}$ lastact = "mail from: <$ s_from> \ r \ n"; fputs ($ FP, $ lastact ); $ lastmessage = fgets ($ FP, 512); // if ($ mail_debug) {echo $ lastact; echo $ lastmessage;} If (substr ($ lastmessage )! = 250) Return-6; $ I = 0; If (is_array ($ to) {foreach ($ to as $ key => $ email) {if ($ email) {$ lastact = "rcpt to: <$ email> \ r \ n"; fputs ($ FP, $ lastact); $ lastmessage = fgets ($ FP, 512 ); // if ($ mail_debug) {echo $ lastact; echo $ lastmessage;} If (substr ($ lastmessage, 250) =) {// return-7; $ I ++ ;}$ tomails [] = "$ key <$ email>" ;}} if ($ I <1) Return-7 ;} else {return-7 ;}$ lastact = "data \ r \ n"; fputs ($ FP, $ lastact); $ lastmessage = Fgets ($ FP, 512); // if ($ mail_debug) {echo $ lastact; echo $ lastmessage;} If (substr ($ lastmessage )! = 354) Return-8; $ head. = "mime-version: 1.0 \ r \ n"; $ head. = "Content-Type: text/html; charset = $ charset \ r \ n"; $ head. = "Subject: $ subject \ r \ n"; $ message = $ head. "\ r \ n ". $ message; $ head = "from :\"". $ from_name. "\" <$ from> \ r \ n "; $ message = $ head. $ message; // $ head = ":\"". $ to_name. "\" <$ to> \ r \ n "; $ head =" :". implode (",", $ tomails ). "\ r \ n"; $ message = $ head. $ message; $ message. = "\ r \ n. \ r \ n "; fputs ($ FP, $ message); // if ($ mail_debug) {$ lastmessage = fgets ($ FP, 512); echo $ head; echo $ lastmessage;} $ lastact = "Quit \ r \ n"; fputs ($ FP, $ lastace); fclose ($ FP); Return 0 ;}

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