我正在尝试从Rails应用程序发送日历邀请。它在Gmail中似乎工作得很好，但在Outlook中就不行了，在Outlook中它是作为附件发送的。
我已经试过网上的每一个建议，但就是不能让它起作用。

class Notifications < ActionMailer::Base
  def add_interaction
    @i = i
    ical = Icalendar::Calendar.new
    e = Icalendar::Event.new
    e.start = DateTime.now.utc
    e.start.icalendar_tzid="UTC" # set timezone as "UTC"
    e.end = (DateTime.now + 1.hour).utc
    e.end.icalendar_tzid="UTC"
    e.organizer @i.interviewer_email
    e.created = DateTime.now
    e.uid = e.url = "#{HOSTNAME.to_s+'/interaction/'+@i.id.to_s}"
    e.summary "#{INTERACTION_TYPE[@i.itype][0]} with #{@i.company}"
    e.description <<-EOF
    #{INTERACTION_TYPE[@i.itype][0]} with #{@i.company}
    Date: #{@i.start_time.strftime('%e %b %Y')}
    Time: #{@i.start_time.strftime('%I:%M %p')}
    EOF
    ical.add_event(e)
    ical.custom_property("METHOD", "REQUEST")

    email=mail(to: "sample@email.com", subject: "Interview",mime_version: "1.0", content_type:"text/calendar",body:ical.to_ical,content_disposition:"inline; filename=calendar.ics", filename:'calendar.ics')
    email.header=email.header.to_s+'Content-Class:urn: content-classes:calendarmessage'
    return email
  end
end

它被称为

Notifications.add_interaction(Interaction.last).deliver

我还试图将邮件构造为

email=mail(to: "nikhil@talentauction.in,nikhil@zobtree.com", subject: "#{@i.bid.company.name} has suggested a time for #{INTERACTION_TYPE[@i.itype][0]}",mime_version: "1.0", content_type:"multipart/alternative",body:'')
    html_body = render_to_string("/notifications/add_interaction")
    email.add_part(
        Mail::Part.new do
            content_type "text/html"
            body html_body
        end
    )
    p = Mail::Part.new do
        content_type 'text/calendar; method=REQUEST name="calendar.ics"'
        content_disposition "inline; filename=calendar.ics"
        content_transfer_encoding "8bit"
        body ical.to_ical
    end
    p.header=p.header.to_s+'Content-Class:urn: content-classes:calendarmessage'
    email.add_part(p)

但在所有情况下，日历邀请都作为outlook中的附件传递。
”””我注意到一些奇怪的事情，这可能是原因。当我查看电子邮件的来源时，在这两种情况下，最上面的mimetype都是multipart/mixed（而不是第一次的text/calendar和第二次的multipart/alternative）**
而当从控制台发送电子邮件时，它会这样说

Message-ID: <5332b0db144e8_1a80129d7f866915@skynet.mail>
Subject: Talent Auction has suggested a time for Introduction Call
Mime-Version: 1.0
Content-Type: text/calendar;
 charset=UTF-8
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
 filename=calendar.ics
filename: calendar.ics
Content-Class: urn: content-classes:calendarmessage

BEGIN:VCALENDAR
VERSION:2.0
METHOD:REQUEST
CALSCALE:GREGORIAN
PRODID:iCalendar-Ruby
BEGIN:VEVENT
CREATED:20140326T162000
DESCRIPTION:        Introduction Call with Talent Auction\n     Date: 28 Mar 2014\n 
    Time: 04:00 PM\n
DTEND:20140327T105000Z
DTSTAMP:20140326T105000Z
DTSTART:20140326T105000Z
CLASS:PUBLIC
ORGANIZER:nikhil@zobtree.com
SEQUENCE:0
SUMMARY:Introduction Call with Talent Auction
UID:localhost:300019
URL:localhost:300019
END:VEVENT
END:VCALENDAR

**编辑：**我使用mandrill发送电子邮件，如果这将是任何帮助