Unable to send email using Gmail SMTP server through PHPMailer getting error SMTP AUTH is required for message submission on port 587 How to fix

Question

I would like to send an email using Gmail SMTP server through PHP Mailer   this is my code   lt  php require once  class phpmailer php      mail   new PHPMailer     mail- gt IsSMTP     mail- gt CharSet  UTF-8    mail- gt SMTPSecure    tls    mail- gt Host    smtp gmail com    mail- gt Port   587   mail- gt Username    MyUsername gmail com    mail- gt Password    valid password    mail- gt SMTPAuth   true    mail- gt From    MyUsername gmail com    mail- gt FromName    Mohammad Masoudian    mail- gt AddAddress  anotherValidGmail gmail com     mail- gt AddReplyTo  phoenixd110 gmail com    Information      mail- gt IsHTML true    mail- gt Subject       PHPMailer Test Subject via Sendmail  basic    mail- gt AltBody       To view the message  please use an HTML compatible email viewer     mail- gt Body       Hello    if   mail- gt Send        echo  Mailer Error       mail- gt ErrorInfo    else     echo  Message sent        gt    but I receive this following error  Mailer Error  SMTP Error  The following recipients failed  anotherValidGmail gmail com  SMTP server error  SMTP AUTH is required for message submission on port 587   my domain is vatandesign ir

User · Answer

Also worth noting that if you have two factor authentication enabled, you'll need to setup an application specific password to use in place of your email account's password.

You can generate an application specific password by following these instructions: https://support.google.com/accounts/answer/185833

Then set $mail->Password to your application specific password.

User · Answer

mail   new PHPMailer       create a new object  mail- gt IsSMTP       enable SMTP  mail- gt SMTPDebug   1     debugging  1   errors and messages  2   messages only  mail- gt SMTPAuth   true     authentication enabled  mail- gt SMTPSecure    ssl      secure transfer enabled REQUIRED for Gmail  mail- gt Host    smtp gmail com    mail- gt Port   465     or 587  mail- gt IsHTML true    mail- gt Username    email gmail com    mail- gt Password    password    mail- gt SetFrom  example gmail com     mail- gt Subject    Test    mail- gt Body    hello    mail- gt AddAddress  email gmail com      if   mail- gt Send          echo  Mailer Error       mail- gt ErrorInfo     else       echo  Message has been sent        This code above has been tested and worked for me   It could be that you needed  mail- gt SMTPSecure    ssl    Also make sure you don t have two step verification switched on for that account as that can cause problems also   UPDATED  You could try changing  mail- SMTP to    mail- gt SMTPSecure    tls     It s worth noting that some SMTP servers block connections  Some SMTP servers don t support SSL  or TLS  connections

User · Answer

hello to everyone just wanted to share my experience with phpMailer   that was working locally  XAMPP  but wasn t working on my hosting provider   I turned on phpMailer error reporting     mail- gt SMTPDebug 2   i got  Connection refused Error   I email my host provider for the issue   and he said that he would  open the SMTP PORTS and he opened the ports 25 465 587     Then i got the following error response  SMTP ERROR  Password command failed       Please log in via your web browser and then try again      SMTP Error  Could not authenticate    So google checks if your are logged in to your account  i was when i ran the script locally through  my browser  and then allows you to send mail through the phpMailer script   To fix that  1 go to your google account -  security  2 Scroll to the Key Icon and choose  2 way verification  and follow the procedure 3 When done go back to the key icon  from google account -  security  and choose the second option  create app passwords  and follow the procedure to get the password   Now go to your phpMailer object and change your google password with the password given from the above procedure   you are done    The code  require once  class phpmailer php      phpMailerObj  new PHPMailer                      phpMailerObj- gt isSMTP                                         phpMailerObj- gt SMTPDebug   0                   phpMailerObj- gt Debugoutput    html                                        phpMailerObj- gt Host    smtp gmail com                                         phpMailerObj- gt Port   587                   phpMailerObj- gt SMTPSecure    tls                    phpMailerObj- gt SMTPAuth   true                                    phpMailerObj- gt Username    YOUR EMAIL                                     phpMailerObj- gt Password    THE NEW PASSWORD FROM GOOGLE                     phpMailerObj- gt setFrom  YOUR EMAIL ADDRESS    THE NAME OF THE SENDER  0                    phpMailerObj- gt addAddress  RECEIVER EMAIL ADDRESS    RECEIVER NAME                      phpMailerObj- gt Subject    SUBJECT                    phpMailerObj- gt Body   MESSAGE                    if   phpMailerObj- gt send                          echo  phpMailerObjer Error       phpMailerObj- gt ErrorInfo                      return 0                    else                       echo  Message sent                        return 1

User · Answer

I think it is connection issue you can get code here http   skillrow com sending-mail-using-smtp-and-php   include    smtpfile php      include    saslfile php         for SASL authentication  from    my website com       from mail id   smtp new smtp class    smtp- gt host name    www abc com        name of host  smtp- gt host port 25   port of host   smtp- gt timeout 10   smtp- gt data timeout 0   smtp- gt debug 1   smtp- gt html debug 1   smtp- gt pop3 auth host          smtp- gt ssl 0   smtp- gt start tls 0   smtp- gt localhost    localhost      smtp- gt direct delivery 0    smtp- gt user    smtp username      smtp- gt realm          smtp- gt password    smtp password       smtp- gt workstation          smtp- gt authentication mechanism           mail  smtp- gt SendMessage  from array  to  array    From  from       To   to       Subject   subject       Date      strftime     a   d  b  Y  H  M  S  Z          message       if  mail      echo    Mail sent      else     echo  smtp- gt error

User · Answer

Open this Link and select follow the instructions google servers blocks any attempts from unknown servers so once you click on captcha check every thing will be fine

User · Answer

If you are using cPanel you should just click the wee box that allows you to send to external servers by SMTP      Login to CPanel   Tweak Settings   All   Restrict outgoing SMTP to   root  exim  and mailman  FKA SMTP Tweak     As answered here    quot Password not accepted from server  535 Incorrect authentication data quot  when sending with GMail and phpMailer

User · Answer

Google treat Gmail accounts differently depending on the available user information  probably to curb spammers   I couldn t use SMTP until I did the phone verification  Made another account to double check and I was able to confirm it

User · Answer

mail- gt SMTPOptions   array                   ssl    gt  array                       verify peer    gt  false                       verify peer name    gt  false                       allow self signed    gt  true

User · Answer

this code working fine for me        mail   new PHPMailer        Enable SMTP debugging        mail- gt SMTPDebug   0        Set PHPMailer to use SMTP       mail- gt isSMTP          Set SMTP host name                                mail- gt Host    hostname        Set this to true if SMTP host requires authentication to send email      mail- gt SMTPAuth   true        Provide username and password           mail- gt Username    sender       mail- gt Password    mail password        If SMTP requires TLS encryption then set it      mail- gt SMTPSecure    ssl         Set TCP port to connect to       mail- gt Port   465       mail- gt From    sender         mail- gt FromName    sender name       mail- gt addAddress  to        mail- gt isHTML true        mail- gt Subject    Subject       mail- gt Body    Body       mail- gt AltBody    This is the plain text version of the email content       if    mail- gt send              echo  Mailer Error       mail- gt ErrorInfo            else              echo  Mail Sent Successfully

User · Answer

So I just solved my own  SMTP connection failure  error and I wanted to post the solution just in case it helps anyone else   I used the EXACT code given in the PHPMailer example gmail phps file  It worked simply while I was using MAMP and then I got the SMTP connection error once I moved it on to my personal server   All of the Stack Overflow answers I read  and all of the troubleshooting documentation from PHPMailer said that it wasn t an issue with PHPMailer  That it was a settings issue on the server side  I tried different ports  587  465  25   I tried  SSL  and  TLS  encryption  I checked that openssl was enabled in my php ini file  I checked that there wasn t a firewall issue  Everything checked out  and still nothing   The solution was that I had to remove this line    mail- gt isSMTP      Now it all works  I don t know why  but it works  The rest of my code is copied and pasted from the PHPMailer example file

User · Answer

Anderscc has got it correct  Thanks  It worked for me but not 100   I had to set  mail- gt SMTPDebug   0   Setting it to 1  can cause errors especially if you are passing some data as json to next page  Example - Performing verification if mail is sent  using json to pass data through ajax  I had to lower my gmail account security settings to get rid of errors   quot  SMTP connect   failed  quot  and  quot  SMTP ERROR  Password command failed  quot  Solution  This problem can be caused by either  less secure  applications trying to use the email account  this is according to google help  not sure how they judge what is secure and what is not  OR if you are trying to login several time in a row OR if you change countries  for example use VPN  move code to different server or actually try to login from different part of the world   Links that fix the problem  you must be logged into google account    view recent attempts to use the account and accept suspicious access   link to disable the feature of blocking suspicious apps technologies  https   www google com settings u 1 security lesssecureapps   Note  You can go to the following stackoverflow answer link for more detailed reference  https   stackoverflow com a 25175234

User · Answer

It seems that your server fails to establish a connection to Gmail SMTP server  Here are some hints to troubleshoot this  1  check if SSL correctly configured on your PHP  module that handle it isn t installed by default on PHP  You have to check your configuration in phph ini   2  check if your firewall let outgoing calls to the required port  here 465 or 587   Use telnet to do so  If the port isn t opened  you ll then require some support from sysdmin to setup the config  I hope you ll sort this out quickly

[php] Unable to send email using Gmail SMTP server through PHPMailer, getting error: SMTP AUTH is required for message submission on port 587. How to fix?

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