Безразмерные рамочки на все случаи.
<center><table style="width: 650px; border-radius: 10px; box-shadow: inset rgba(0,0,0,.5) 0 -4px 5px, inset rgba(252,255,255,.5) 0 4px 7px, -7px 18px 36px -20px #000000;" background="//img1.liveinternet.ru/images/attach/d/2/145/598/145598855_51.jpg" cellspacing="0" cellpadding="0"><tr><tr><td style="padding:20px" zzz="zzz" align="center"><table style="background-image: url('//img1.liveinternet.ru/images/attach/d/0/144/163/144163879_0_8e510_c72490d8_S.jpg');border-radius: 10px;" cellspacing="0" cellpadding="0" width="650"><tr><td style="padding:2px" zzz="zzz" align="center"><table style="background-image: url('//img1.liveinternet.ru/images/attach/d/2/145/598/145598855_51.jpg');border-radius: 10px;" cellspacing="0" cellpadding="0" width="650"><tr><td style="padding:10px" zzz="zzz" align="center"><span style="font-family:arial;color:#DFC86E;text-shadow:1px -1px #000000;font-size:17px"><br /> *** ВАШ ТЕКСТ***<br /> <img data-cke-saved-src="//img0.liveinternet.ru/images/attach/d/2/145/599/145599346_uJDMYSG.png" src="//img0.liveinternet.ru/images/attach/d/2/145/599/145599346_uJDMYSG.png" width="350" height="20" alt="uJDMYSG (700x44, 8Kb)" /><br /> <a target="_blank" data-cke-saved-href="http://www.liveinternet.ru/users/schamada/" href="http://www.liveinternet.ru/users/schamada/" title="Schamada ( ник не стирать)"><img data-cke-saved-src="//img1.liveinternet.ru/images/attach/c/11/117/103/117103913_0_3f811_d7b8a3af_S.gif" src="//img1.liveinternet.ru/images/attach/c/11/117/103/117103913_0_3f811_d7b8a3af_S.gif" width="11" height="11" alt="0_3f811_d7b8a3af_S (11x11, 1Kb)" /></a><br /> </span></td></tr></table></td></tr></table></td></tr></tr></table></center>