How is it even possible to track the open rate without HTML? I'm not an email expert and genuinely curious.
I was under the impression that people use <img> tags for that.
I was under the impression that people use <img> tags for that.
I find that statement very surprising. I haven't sent a single HTML mail in... all the time since I started using email. I never had deliverability problems that I could trace down to the mails being text.
(I also have surprisingly few deliverability problems to begin with and my gut feeling is 90% of hostmaster complains can be described as "you've been blocked by the spam filter because you were sending spam".)