Hi @lakshmipravallika
The idea is to put text content directly in the body of our email first (just after the opening of <body>). Then, by using some style declarations via CSS, we will hide this preheader text:
<body style="margin: 0;" bgcolor="#ffffff">
<!-- ====================
<Preheader formatting>
===================== -->
<div>
<span style="color: #ffffff; font-family: Arial, sans-serif; font-size: 0px;display: none !important;overflow: hidden;">
Add 40-100 Characters of Preheader Text Here
<!-- These HTML entities add 100 white space characters after the preheader. This prevents unwanted text from elsewhere in the email from cluttering the preheader text space. -->
͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌
͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌
͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌
͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌
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͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌
͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌
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͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌
͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌
͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌
͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌
͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌
͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌
͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌
͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌
͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌
͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌
͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌ ͏ ‌
</span>
</div>
<!-- ====================
</ Preheader formatting>
===================== -->
<table width="1" height="1" cellpadding="0" cellspacing="0" border="0">
Thanks,
David