My email signature keeps disappearing from my iPhone
4th Feb 2015: FIXED! This issue has been fixed. Please see new instructions for installing your email signature in your iPhone here.
Update: 4th February 2015
We have a solution! Please use the above updated guides to install your signatures.
Our previous instructions told us to first setup the email signature in a desktop email program, like Apple Mail or Outlook, then email the signature to the iPhone or iPad and copy the signature from the email message and paste it into the iPad or iPhone's signature settings.
Upon investigating further, the images stored in the email message you receive with your signature included must be stored in a temporary location on your iPhone or iPad.
When we receive an email message, the images in the email are no longer referencing the images that are hosted online, like images for a HTML signature should be. Instead, they are saved to a temporary location on your iPhone or iPad. (This may have changed in an iOS update, as before 7.1.2 this previous installation method was working.)
So when we copy and paste directly from an email message, the images will disappear later on, because they are not referencing the images in the email signature's HTML file (hosted by us), they are now referencing the images in the email message, stored on the iPhone or iPad in a temporary location.
To overcome this, we simply email the HTML file directly to the iPhone or iPad via email, and open the HTML file in a new window, and copy the signature from there.
Now we are no longer copying the images from the email message, we are copying them from the HTML file, with the correct image file paths.
If your email signature won't save or keeps disappearing when you add it to your iPhone, there's a fix for this: