I'm using gomail.v2 to send html email messages. There is a problem with the encoding / decoding of the html. Here are the relevant the lines of code:
m := gomail.NewMessage()
// ... a bunch of lines removed, for clarity...
s, err := GenerateBodyHTML(si.MsgFName, si.Hostname, &p, t)
if err != nil {
return err
}
m.SetBody("text/html", s)
err = d.DialAndSend(m)
I generate the HTML as a string and I verified that it is correct -- I can write the contents of s to a file and open that file in a browser and it all looks fine. So, for example, here are a few lines from the middle of s:
<body>
<a href="http://myisolabella.com/"><img src="http://ec2-54-152-108-202.compute-1.amazonaws.com:8275/iblogosm.png"></a>
<p>Hello Tom,</p>
But in the 3 email clients I tested, here's what the raw message body looks like:
<body>
<a href=3D"http://myisolabella.com/"><img src=3D"http://ec2-54-152-108-202.compute-1.amazonaws.com:8275/iblogosm.png"></a>
<p>Hello Tom,</p>
So the link and image tags don't work when the message renders. The equal sign is still in quoted-printable form. Here are the relevant headers received by the email client (I removed most of them for brevity, plus nothing else looked relevant):
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable
What do I need to do to get the HTML decoded correctly on the mail client?
After digging into this problem further, the data inside the mail client should look the way it is shown above, and the HTML does render properly. It turns out that the first link I was looking at didn't work for a completely unrelated reason.