Škodlivý kód v podpisu e-mailu

Dobrý den, kdykoliv se snažím nastavit formátovaný html podpis v e-mailu, automaticky se mi přidá tento kód:

<div id=“newsvd_popupMenu“>&nbsp;</div>
<div id=“newsvd_popupMenu“>&nbsp;</div>
<div class=“newsvd_mengceng“ style=“display: none;“>
<div id=“newsvd_backMask“ class=“backMask“>
<div id=“pop“ class=“pop“>
<div id=“newsvd_notice“ class=“notice“>
<div id=“newsvd_notice_in“ class=“notice_in“>
<div class=“notice_in_svg“>&nbsp;</div>
<div id=“newsvd_notice_in_span“ class=“notice_in_span“><span>We will support it soon! Click</span> <span id=“external_ffmpeg“ class=“external_ffmpeg“>2k/4k</span> <span>to download videos first.</span></div>
</div>
</div>
<div id=“newsvd_dialog“ class=“newsvd_dialog“>
<div class=“top_pro_container“>
<div class=“top_pro“>Pro</div>
<span class=“top_pro_span“>Subscription will automatically renew every month before you unsubscribe.</span></div>
<div id=“newsvd_dialog_close“ class=“newsvd_dialog_close“>&nbsp;</div>
<div id=“newsvd_dialog_in“ class=“dialog_in“>
<div id=“pro“ class=“pro“><span>Monthly</span></div>
<div class=“dialog_line“>&nbsp;</div>
<div id=“feature_explain“ class=“feature_explain“><span id=“fee“ class=“fee“> <span>$ 2.99</span> <span> / month</span> </span>
<div id=“feature_list“ class=“feature_list“>
<ul id=“feature_list_ul“>
<li><span>1000+ embedded vimeo player sites supported</span></li>
<li><span>Support video downloading in more resolutions e.g. 4k, 2k, 1080p, etc.</span></li>
<li><span>Support for downloading private videos</span></li>
<li><span>Support for extracting audio</span></li>
<li><span>Support for downloading subtitles</span></li>
<li><span>Unlimited downloads</span></li>
</ul>
</div>
</div>
<button id=“newsvd_dialog_get“ class=“dialog_get“>Get</button>
<p style=“text-align: center; font-size: 12px; color: #888483; margin-bottom: 15px;“>Click <span id=“payment_method“ style=“color: #08abef; cursor: pointer;“>here</span> to get other payment method</p>
</div>
<p style=“text-align: center; font-size: 12px;“>Tip：Please refresh the page after the payment is successful</p>
</div>
</div>
</div>
</div>
<div id=“payment_popup“ style=“display: none;“>
<div class=“payment_content“>
<div id=“payment_popup_close“ class=“dialog_close“ style=“margin-left: 370px;“>&nbsp;</div>
<h3 style=“text-align: center; margin-top: 20px; line-height: 40px;“>What is the payment method you want？</h3>
<p style=“text-align: center; font-size: 12px; color: #888483;“>We will gradually support it</p>
<div class=“payment_select“><input id=“paypal“ class=“payment_select_label“ name=“payment_method“ type=“radio“ value=“paypal“ /><label class=“payment_label“ for=“paypal“>PayPal</label><br /><input id=“braintree“ class=“payment_select_label“ name=“payment_method“ type=“radio“ value=“braintree“ /><label class=“payment_label“ for=“braintree“>Braintree</label><br /><input id=“alipay“ class=“payment_select_label“ name=“payment_method“ type=“radio“ value=“alipay“ /><label class=“payment_label“ for=“alipay“>Alipay</label><br /><input id=“other“ class=“payment_select_label“ name=“payment_method“ type=“radio“ value=“other“ /><label class=“payment_label“ for=“other“><input id=“otherPayment“ type=“text“ /></label></div>
<button id=“pay_submit“ style=“cursor: pointer; border: none; display: block; border-radius: 5px; background-color: #367ecb; height: 30px; width: 100px; line-height: 30px; margin: 22px auto 17px; font-weight: 600; color: white;“>Submit</button></div>
</div>

Nedokážu identifikovat, odkud pochází, kde hledat a co konkrétně je napadeno.

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