PHP Swift mailer Failed to authenticate on SMTP using 2 possible authenticators

Question

When I send an email with the PHP Swift mailer to this server  smtp exchange example com like this      Load transport  this- gt transport       Swift SmtpTransport  newInstance         self   config- gt hostname         self   config- gt port           - gt setUsername self   config- gt username      - gt setPassword self   config- gt password            Load mailer  this- gt mailer   Swift Mailer  newInstance  this- gt transport       Initialize message  this- gt message   Swift Message  newInstance        From  this- gt message- gt setFrom self   config- gt from       Set message etc          Send  this- gt mailer- gt send  this- gt message     I get a strange error back      Failed to authenticate on SMTP server with username  user example com  using 2 possible authenticators   I know for sure that the login-info is correct

User · Answer

The server might require some kind of encryption and secure authentication  see http   swiftmailer org docs sending html encrypted-smtp

User · Answer

First check if there is any connectivity problem and you can reach the SMTP server   In terminal type   telnet servername portnumber    If you receive the 220 response you can reach the SMTP server and there is no connectivity problem but if the connection to the server failed see what s wrong in your network   If the server needs auth try to authenticate on the server by username and password and see if something goes wrong   At last see if the server requires encryption and if yes openssl and other stuff are configured correctly

User · Answer

You perhaps use the wrong username   I had a similar error  Ensure you re not using uppercase while logging into server   Example  JacekPL lala pl  If you use - gt setUsername  JacekPL    this can cause an error  Use - gt setUsername  jacekpl   instead  This solved my problem

User · Answer

I faced the same problem and solved it  Try to log in manually to your gmail account first  This issue is due to google has detected your gmail account has been abusing  E g send a lot of emails over a short period of time

User · Answer

Strange enough sending emails works again  We did not change anything and the host say they did not either  We think a server restarts or so  It is strange  S

User · Answer

This might be old but somebody might get help through this  I too faced the same problem and received a mail on my gmail account stating that someone is trying to hack your account through an email client or a different site  THen I searched and found that doing below would resolve this issue   Go to https   accounts google com UnlockCaptcha  and unlock your account for access through other media sites   UPDATE   2015  Also  you can try this  Go to https   myaccount google com security connectedapps At the bottom  towards right there is an option  Allow less secure apps   If it is  OFF   turn it on by sliding the button

User · Answer

I had the same issue  so I ve disabled one setting on my WHM root login  which is as follows       WHM   Home   Server Configuration   Tweak Settings   Restrict outgoing SMTP to root  exim  and mailman  FKA SMTP Tweak

User · Answer

If you are trying to send mail from your local enviroment eg  XAMPP or WAMP   this error will occur everytime  go ahead and try the same code on your web hosting or whatever you are using for production    Also  2 step authentication from google may be the issue

User · Answer

I tried almost all the possible suggestions mention here but for me problem got solved after changing  Access for less secure apps  to ENABLE in my Google account security settings tab  Hope this might useful for others

User · Answer

I really have the same problem  finally  i solved it   its likey not the Swift Mail s problem  It s Yaml parser s problem  if your password only the digits  the password senmd to swift finally not the same one   swiftmailer      transport   smtp     encryption  ssl     auth mode   login     host        smtp gmail com     username    your username     password    61548921   you need fix it with double quotes       password     61548921

User · Answer

I got the same same error   I was using gmail account and Google s SMTP server to send emails  The problem was due to SMTP  server refusing to authorize as it considered my web host  through whom I sent email  as an intruder   I followed Google s process to identify my web host as an valid entity to send email through my account and problem was solved

User · Answer

I just received the same error    The strange thing is that commented the credential lines      - gt setUsername self   config- gt username     - gt setPassword self   config- gt password    And the problem disappeared    I m puzzled because the mail server definitely needs those credentials

User · Answer

try putting username in double quote  username   somehow that fixed for me

[php] PHP Swift mailer: Failed to authenticate on SMTP using 2 possible authenticators

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