Hi,
I looks like this is not solving the problem. After changing the code I added my template:
<table id="bodyTable" style="border-collapse: collapse; mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; height: 100% !important; width: 100% !important; background: #Ffff; margin: 0; padding: 0;" border="0" width="100%" cellspacing="0" cellpadding="0" align="center" bgcolor="#fff">
<tbody>
<tr>
<td id="bodyCell" style="mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; border-top-width: 0; height: 100% !important; width: 100% !important; margin: 0; padding: 20px;" align="center" valign="top">
<table id="templateContainer" style="border-collapse: collapse; mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; border: 0;" border="0" width="600" cellspacing="0" cellpadding="0">
<tbody>
<tr>
<td style="mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%;" align="center" valign="top">
<table id="templateHeader" style="border-collapse: collapse; mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; border-top-width: 0; border-bottom-width: 0; background: #FFFFFF;" border="0" width="600" cellspacing="0" cellpadding="0" bgcolor="#FFFFFF">
<tbody>
<tr>
<td class="headerContainer" style="mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%;" valign="top">
<table class="mcnImageBlock" style="border-collapse: collapse; mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%;" border="0" width="100%" cellspacing="0" cellpadding="0">
<tbody class="mcnImageBlockOuter">
<tr>
<td class="mcnImageBlockInner" style="mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; padding: 0px;" valign="top">
<table class="mcnImageContentContainer" style="border-collapse: collapse; mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%;" border="0" width="100%" cellspacing="0" cellpadding="0" align="left">
<tbody>
<tr>
<td class="mcnImageContent" style="text-align: center; mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; padding: 0 0px;" align="center" valign="top"><img class="mcnImage" style="max-width: 600px; padding-bottom: 0; display: inline !important; vertical-align: bottom; outline: none; text-decoration: none; -ms-interpolation-mode: bicubic; border: 0;" src="https://gallery.mailchimp.com/0500806d4ea1b3fc656a87d46/images/0f7db7d2-d456-4210-91a3-8d2df6ef001a.png" alt="" width="600" align="center" /></td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
</td>
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</tbody>
</table>
</td>
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<tr>
<td style="mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%;" align="center" valign="top">
<table id="templateBody" style="border-collapse: collapse; mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; border-top-width: 0; border-bottom-width: 0; background: #FFFFFF;" border="0" width="600" cellspacing="0" cellpadding="0" bgcolor="#FFFFFF">
<tbody>
<tr>
<td class="bodyContainer" style="mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%;" valign="top">
<table class="mcnTextBlock" style="border-collapse: collapse; mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%;" border="0" width="100%" cellspacing="0" cellpadding="0">
<tbody class="mcnTextBlockOuter">
<tr>
<td class="mcnTextBlockInner" style="mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%;" valign="top">
<table class="mcnTextContentContainer" style="border-collapse: collapse; mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%;" border="0" width="600" cellspacing="0" cellpadding="0" align="left">
<tbody>
<tr>
<td class="mcnTextContent" style="padding: 10px 18px 9px; font-size: 36px; line-height: 100%; text-align: center;" valign="top"><span style="font-family: open sans,helvetica neue,helvetica,arial,sans-serif;">Auftragsbestätigung</span></td>
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</tbody>
<tbody class="mcnTextBlockOuter">
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<td class="mcnTextBlockInner" style="padding-top: 9px;" valign="top">
<table style="width: 100%;" border="0" width="100%" cellspacing="0" cellpadding="0" align="left">
<tbody>
<tr>
<td style="width: 600px;" valign="top" width="600">
<table class="mcnTextContentContainer" style="max-width: 100%; min-width: 100%;" border="0" width="100%" cellspacing="0" cellpadding="0" align="left">
<tbody>
<tr>
<td class="mcnTextContent" style="padding: 0 18px 9px 18px;" valign="top">
<div style="text-align: center;"><img style="border: 0px; width: 100px; height: 4px; margin: 0px;" src="https://gallery.mailchimp.com/0500806d4ea1b3fc656a87d46/images/7ef7cddb-8b24-4e30-885d-d304646e2c4e.png" width="100" height="4" data-file-id="1123565" /></div>
</td>
</tr>
<tr>
<td class="mcnTextContent" style="padding: 0 18px 9px 18px;" valign="top"> </td>
</tr>
</tbody>
</table>
</td>
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</tbody>
</table>
</td>
</tr>
</tbody>
<tbody>
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<td class="mcnTextContent" style="padding: 0px 60px 9px; font-size: 14px; font-style: normal; font-weight: normal; text-align: center;" valign="top">
<p>Sehr geehrter Auftraggeber,</p>
<p>Ihr Inserat mit der ID {id} wurde geprüft und ist nun für Auftragnehmer zur Bewerbung freigegeben.</p>
<p>Das Inserat ist bis zum {expiration_date} veröffentlicht.</p>
<p>Hier finden Sie den Link zum Inserat: {link}</p>
<p>Vielen Dank,<br />Ihr HostessNet Team</p>
</td>
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</td>
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</tbody>
</table>
<table class="mcnTextBlock" style="border-collapse: collapse; mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%;" border="0" width="100%" cellspacing="0" cellpadding="0">
<tbody class="mcnTextBlockOuter">
<tr>
<td class="mcnImageContent" style="text-align: center; padding: 0 0px 0 0px;" valign="top"><img class="mcnImage" style="max-width: 957px; padding-bottom: 0; display: inline !important; vertical-align: bottom;" src="https://gallery.mailchimp.com/0500806d4ea1b3fc656a87d46/images/eaa81d1e-1745-4159-ae30-a550f959cb85.png" alt="" width="600" align="center" /></td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
</td>
</tr>
<tr>
<td style="mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%;" align="center" valign="top">
<table id="templateFooter" style="background-color: #e8eaed; border-collapse: collapse; border-top-width: 0; border-bottom-width: 0; background: #ffffff; width: 600px;" border="0" cellspacing="0" cellpadding="0" bgcolor="#FFFFFF">
<tbody>
<tr>
<td class="footerContainer" style="background-color: #e8eaed; padding-bottom: 9px; mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%;" valign="top">
<table class="mcnBoxedTextBlock" style="border-collapse: collapse; mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%;" border="0" width="100%" cellspacing="0" cellpadding="0">
<tbody class="mcnBoxedTextBlockOuter">
<tr>
<td class="mcnBoxedTextBlockInner" style="mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%;" valign="top"><span style="font-size: 14px;"> </span></td>
</tr>
</tbody>
</table>
<table class="mcnFollowBlock" style="background-color: #e8eaed; border-collapse: collapse; mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%;" border="0" width="100%" cellspacing="0" cellpadding="0">
<tbody class="mcnFollowBlockOuter">
<tr>
<td class="mcnTextContent" style="background-color: #e8eaed; padding: 0px 18px 9px; font-size: 14px; font-style: normal; font-weight: bold; text-align: center;" valign="top"><span style="font-size: 14px; font-weight: 400;"><span style="font-family: open sans,helvetica neue,helvetica,arial,sans-serif;"> <a style="color: black; text-decoration: none; font-weight: normal;" href="/www.hostessnet.de/agb"> AGB </a> </span> <span style="font-family: open sans,helvetica neue,helvetica,arial,sans-serif;"> <a style="color: black; text-decoration: none; font-weight: normal;" href="/www.hostessnet.de/datenschutz"> DATENSCHUTZ </a> </span> <span style="font-family: open sans,helvetica neue,helvetica,arial,sans-serif;"> <a style="color: black; text-decoration: none; font-weight: normal;" href="/www.hostessnet.de/impressum"> IMPRESSUM </a> </span></span></td>
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<tr>
<td class="mcnTextContent" style="padding: 0px 18px 9px; font-size: 14px; font-style: normal; font-weight: bold; text-align: center;" valign="top"><span style="font-size: 14px; font-weight: 400;"> </span></td>
</tr>
<tr>
<td class="mcnTextContent" style="padding: 0px 18px 9px; font-size: 14px; font-style: normal; font-weight: bold; text-align: center;" valign="top">
<div style="background-color: #e8eaed; font-family: 'Montserrat', sans-serif;"><span style="font-family: Verdana, Arial, Helvetica, sans-serif;"><span style="font-size: 14px; font-weight: 400;"><img style="border: 0px; width: 31px; height: 30px; margin: 0px;" src="https://gallery.mailchimp.com/0500806d4ea1b3fc656a87d46/images/50c5ccf3-fe03-48a3-9373-879abb930b5f.png" width="31" height="30" data-file-id="1123585" /></span></span></div>
</td>
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</tbody>
</table>
<table class="mcnTextBlock" style="border-collapse: collapse; mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%;" border="0" width="100%" cellspacing="0" cellpadding="0">
<tbody class="mcnTextBlockOuter">
<tr>
<td class="mcnTextBlockInner" style="mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%;" valign="top">
<table class="mcnTextContentContainer" style="border-collapse: collapse; mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%;" border="0" width="600" cellspacing="0" cellpadding="0" align="left">
<tbody>
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<td class="mcnTextContent" style="padding: 0px 18px 9px; color: #000000; font-size: 14px; font-style: normal; text-align: center;" valign="top"> </td>
</tr>
<tr>
<td class="mcnTextContent" style="padding: 0px 18px 9px; color: #000000; font-size: 14px; font-style: normal; text-align: center;" valign="top"><span style="font-size: 14px;"> </span></td>
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</tbody>
</table>
</td>
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</tbody>
</table>
</td>
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</tbody>
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</table>
and after saving the and entering it again the code was gone...
Leni