Hello.
I'am have trouble with email fixed width(600px, 700px, 900px)
On mobile devices, (iphone, Galaxy S7 Edge, Galaxy Tab3) i have lines between td.
Samsung Galaxy S7 Edge
If i change resolution on device, this lines more visible.
On desctop clients, all right.
This problem have solution or trouble in resized on devices?

And also have problem with vertical borders on some mobile devices.
border
In html, all borders have: width:1px; font-size:1px; but vertical borders show like 2px in width. Img for borders, too big solution, maby have ideas for fix it?
Thank for your any help.