Symfony 2 : Swiftmailer exception

Question

I've been working on the Symfony 2 emails sending using Swiftmailer.

Here is my swiftmailer configuration in app/config/config.yml

swiftmailer:
 transport: gmail
 username:  [email protected]
 host:      smtp.gmail.com
 password:  mypassword

I have also configured my xampp localhost to send emails.

I have a form where user enters email addresses (max 5 emails) , Subject and Message. For first few tests on submitting the form the emails where sent. I also actually got emails. But after that i've been getting this error below repeatedly.

Failed to authenticate on SMTP server with username "[email protected]" using 1 possible authenticators 500 Internal Server Error - Swift_TransportException

What is the problem over here? I also tried stopping my xampp and then re-starting it, but still the problem persists. Does any one know whats the problem here?

Thank You.

Sebastian Sebastian · Accepted Answer · 2017-01-16T13:27:12

You're facing this issue because you haven't properly setup your mailing host. First off, I strongly recommend that you use a service such as SendGrid and configure it as detailed in this Symfony2 Mailing Setup Tutorial:

mailer_transport: smtp
mailer_host: smtp.sendgrid.net
mailer_user: your_sendgrid_username
mailer_password: 'your_sendgrid_password'
mailer_port: 587

The tutorial also contains details on how to properly setup a mailing service in Symfony2 and how to build mailing templates.

But you if you still want to use Gmail, then the correct configuration is:

mailer_transport: smtp
mailer_host: smtp.gmail.com
mailer_user: [email protected]
mailer_password: 'your_gmail_password'
mailer_port: 587

Symfony 2 : Swiftmailer exception

2 Answers