Here’s something you might have missed in Rails.
Implicit template rendering is not performed if any attachments or parts have been added to the email. This means that you‘ll have to manually add each part to the email and set the content type of the email to multipart/alternative.
class SomeMailer < ActionMailer::Base # assumes that there's a file named pretty_template.html.erb in app/views/some_mailer def html_email_with_attachment(email_address, msg) recipients [email_address] from "firstname.lastname@example.org" subject "This is an html email with an attachment" # have to set content_type explicitly content_type "multipart/alternative" # then set the html part. Note that there is no call to body(), but # the second argument is a hash containing what you'd put into body() normally. part(:content_type => "text/html", :body => render_message("pretty_template", :message => msg) attachment(:content_type => "text/csv", :filename => "attachment.csv", body => CSVGenerator.generate_csv_string) # as a note, all attachment is doing is adding transfer_encoding and disposition # part(:content_type => "text/csv", # :transfer_encoding => "base64", # :disposition => "attachment", # :filename => "attachment.csv", # :body => CSVGenerator.generate_csv_string) end end
There, now you can have html and your attachments too. Reference: http://am.rubyonrails.org/classes/ActionMailer/PartContainer.html#M000006