Hey,
I get to this moment when my Mail is working properly on each mail clients except windows phone mail app. I've read something about it and Im sure that the pixel density (DPI) https://blog.jmwhite.co.uk/2015/12/11/html-email-in-outlook-mail-on-windows-10/ is a major problem. All content in background place is broken up on windows phone, the background is getting resized but when I want to define width and height in conditionals comments it's serious going to be better, but only on windows mail app and content on background is invisible when on others Outlook major mail clients started to have issues. I wanted to solve tihs problem with way which is described on this page https://litmus.com/community/discussions/4176-windows-10-mail-bulletproof-background-buttons-broken but this doesn't work good on windows mail app.
Please help if you have any solutions for this.

I put here the screen with container with which I have a problem for better look:

<container>
<row>
<columns small="12" large="12" class="background-picture" width="580" height="344" style="background-image: url('http://kuba.dev.sequencesh.com/ergo_kantor/images/bg_header.jpg') !important;" background="http://kuba.dev.sequencesh.com/ergo_kantor/images/bg_header.jpg"><!-- << Dodać atrybut background do wersji po inlinerze -->
<!--[if mso]>
<v:rect xmlns:v="urn:schemas-microsoft-com:vml" fill="true" stroke="false" style="width:580px;height:344px;">
<v:fill type="tile" src="http://kuba.dev.sequencesh.com/ergo_kantor/images/bg_header.jpg" color="#FFFFFF" />
<v:textbox inset="0,0,0,0">
<![endif]-->

<table class="no-mso">
<tr class="">
<th class="p-1 white" style="padding-top:63px; padding-left: 8px;text-align: center;">
<h1 class="text-center white" style="color:#fff !important;">Dziękujemy za rejestrację!</h1>
</th>
</tr>
</table>

<!--[if mso]>
<p style="font-family:'Helvetica', 'Arial', sans-serif; font-size: 19px; color: white; margin-top: 63px; padding-left: 8px; text-align: center;" align="center">Dziękujemy za rejestrację!</p>
<![endif]-->

<!--[if mso]>
<p style="color: #ffffff; font-family: 'Helvetica', 'Arial', sans-serif; font-weight: normal; text-align: center; line-height: 0px; font-size: 13px; margin: 0 0 10px;" align="center">Aby dokończyć rejestrację musisz aktywować konto klikając w poniższy przycisk.</p>
<![endif]-->
<table>
<tr>
<th class="p-2 white">
<p class="text-center lead no-mso white font-13">Aby dokończyć rejestrację musisz aktywować konto klikając w poniższy przycisk.</p>
</th>
</tr>
</table>

<row> 
<columns class="test">
<center>
<button href="#" class="button-object round no-mso" style="display:block;mso-hide:all;"><p class="press text-center">aktywuj konto w ergokantor.pl<img class="arrow" alt=">" src="http://kuba.dev.sequencesh.com/ergo_kantor/images/arrow_right.png" style="float:right;display:inline-block;"></button>
</center>
</columns>
</row>

<!--[if mso]>
<p style="font-size: 11px;color: #fff;text-align: center;font-family: Helvetica, Arial, sans-serif;position:absolute;bottom:40px;line-height: 15px;margin-top:40px;margin-bottom:28px;">Lub jeśli nie widzisz powyższego przycisku skorzystaj z linku poniżej wklejająć go do przeglądarki:<br><a style="color: #82c13a;text-decoration: none;" href="https://www.google.pl/?gfe_rd=cr&ei=BUSfVrv1N9Gv8wf3grOYBQ&gws_rd=ssl#q=sf">https://www.google.pl/?gfe_rd=cr&ei=BUSfVrv1N9Gv8wf3grOYBQ&gws_rd=ssl#q=sf</a></p>
<![endif]-->

<row>
<columns>
<p class="p-3 text-center">Lub jeśli nie widzisz powyższego przycisku skorzystaj z linku poniżej wklejająć go do przeglądarki:<br><a style="color: #82c13a !important" href="https://www.google.pl/?gfe_rd=cr&ei=BUSfVrv1N9Gv8wf3grOYBQ&gws_rd=ssl#q=sf">https://www.google.pl/?gfe_rd=cr&ei=BUSfVrv1N9Gv8wf3grOYBQ&gws_rd=ssl#q=sf</a></p>
</columns>
</row>

<!--[if mso ]>
/v:textbox
/v:rect
<v:roundrect xmlns:v="urn:schemas-microsoft-com:vml" xmlns:w="urn:schemas-microsoft-com:office:word" href="http://www.hollandamerica.com/pageByName/Simple.action?requestPage=Sos-terms&WT.mc_id=email_%%PROJECT%%&WT.dcsvid=%%MARINER_ID%%&stop_mobi=yes" style="left: 87px; top: 190px; width: 406px; height:62px;v-text-anchor:middle; padding:12px 29px 12px 29px; position: absolute;background: #9dce48; background: -webkit-linear-gradient(#9dce48, #7bbe36); background: -o-linear-gradient(#9dce48, #7bbe36); background: -moz-linear-gradient(#9dce48, #7bbe36); background: linear-gradient( #9dce48, #7bbe36);" arcsize="50%" fillColor="#7bbe36">

<v:fill type="gradient" src="http://kuba.dev.sequencesh.com/ergo_kantor/images/bg_header.jpg" color2="#9dce48" />
<w:anchorlock/>

<center style="color:#ffffff;font-family:Arial, Helvetica, sans-serif;font-size:16px;text-transform:uppercase;font-weight:bold;">
aktywuj konto w ergokantor.pl <img class="arrow" style="position: absolute;" src="http://kuba.dev.sequencesh.com/ergo_kantor/images/arrow_right.png" style="float: right;"/></a>
</center>

/v:roundrect
<![endif]-->
</columns>
</row>
</container>