I use a totally up to date AquaMail pro on my mobile (Android Lollipop). I run my own mail server for many years with many clients, never as issue.
Now I have an issue with 1 person. When I send an email from my webmail client or Outlook on the PC, they receive the email fine.
When I send an email to this 1 person the body (most of the body) of the email is removed, meaning they see subject, the signature and all the thread.
They are using Yahoo and confirm the issue persists with both Yahoo Mail for Android and the Yahoo web client.
This is a strange issue to debug, both parties can explain why they're not at fault because every one receives my emails (from AquaMail) other than this 1 person. Yet, in regards to this 1 person's perspective, he can send/receive from every one other than me when I send the email from AquaMail.
When I send emails to this person, another person is always copied in and they receive the email as expected. To me, this conclusively concludes that the email I'm sending is correct but, any ideas why this is? My only thought is if the email is an HTML email, that may be a built in CSS style is being overwritten by their client but if this were the case I'd have thought to see others post the same issue.