Here are the issues mentioned that were encountered during testing.
Please read carefully to avoid disappointment.
Be careful with converting too large images for email use
The Pixlcodr image-blocker can deliver html-code even for larger images (up to a width of 600px) for your mail-template. But a large image delivers more code than a smaller one. Keep this in mind, when using the pixlcodr-convertor. In other words: it is more useful to display small coded 'images'.
Outlook 2013 column amount restriction
Outlook 2013 truncates Pixlcodr-ed tables on the horizontal-axis because there is a limitation to the number of columns that Outlook 2013 can handle. This issue is caused by the renderengine in email for Outlook: Word (believe it or not!) . The maximum number of columns on the horizontal-axis is 62. The issue is not solvable.
Outlook 2013 does not respect height in empty table cells
In Outlook 2013 empty table cells (or cells containing a & nbsp;) now have a minimum height of roughly 15px, regardless of what you've set a cell's height attribute to be.
To fix this bug, add conditional comments to your email-template like this:
What is the Gmail-message-length restriction?
The restriction of Gmail is that your mail-message may not be larger than 100 kB. If the message is longer, it still will be sent, but the mail-message is cut off and the end-user will have to click a link to see the whole message. Keep this in mind with the converted image you want to sent.