How use http proxy to send mails?

[gowthamsadasivam]

Issue Summary

My rails web application runs behind a corporate firewall which doesn't allow direct internet access. The usual tools like apt, curl are just working fine by setting the environment variable "http_proxy" and "https_proxy".

The rails application uses "sendgrid-ruby" gem to send emails, unfortunately the application doesn't respect the "http_proxy" variable and always tries to send the emails by directly connecting to the internet. which eventually fails due to no direct internet connections are allowed.

I would like to know, Is there a way to use the proxy servers to send emails using SendGrid API.

I have searched on other SendGrid packages and could relate to the following issues:

Java Example:
sendgrid/sendgrid-java#138
sendgrid/sendgrid-java#182

CSharp Example:
sendgrid/sendgrid-csharp#197

Is there a similar solution exists for SendGrid-ruby library?

Steps to Reproduce

1. Disconnect direct internet access from the server.
2. Setup a working portforward/proxy server and set "http_proxy" and "https_proxy" environment variables using "/etc/environment" and source it to the current shell.
3. Try sending email using SendGrid API.
4. Now you will be able to see that mail sending failed in either stdout/stderr or the log file.

Technical details:

• sendgrid-ruby Version: sendgrid-ruby-5.2.0
• Ruby Version: 2.2.6p396 (2016-11-15 revision 56800) [x86_64-linux]
• RVM Version: 1.29.3

[thinkingserious]

Hi @gowthamsadasivam,

Thanks for the heads up, I have created an issue (please follow along there) to allow for setting a proxy.

With Best Regards,

Elmer