How to download and setup resque_mailer
Open terminal and run command
                                            git clone https://github.com/zapnap/resque_mailer.git
                                        
                                        git clone is used to create a copy or clone of resque_mailer repositories.
                                        You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with resque_mailer https://github.com/zapnap/resque_mailer/archive/master.zip
Or simply clone resque_mailer with SSH
                                            [email protected]:zapnap/resque_mailer.git                                    
                                    If you have some problems with resque_mailer
You may open issue on resque_mailer support forum (system) here: https://github.com/zapnap/resque_mailer/issuesSimilar to resque_mailer repositories
Here you may see resque_mailer alternatives and analogs
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