font size 0 / display: none for 1px high TD .. is it a spam trigger?

Hi,

I'm trying to put a horizontal rule in an email that will work in Lotus and Outlook as well as everything else

best option so far is to use font-size: 0  and mso-line-height etc, as per this discussion eg

<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr class="font-size:1px; mso-line-height-alt:0; mso-margin-top-alt:1px">
<td height="1" style="background:none; border:solid 1px #FFFFFF; border-width:1px 0 0 0; height:1px; width:100%; margin:0px 0px 0px 0px; font-size: 0px; line-height: 0px;">&nbsp;</td>
</tr>
</table>

but I'm concerned font-size:0 is a spam trigger. I know spamassassin had this in their rules eg HTML_FONT_SIZE_TINY

anyone have any other solutions?

thanks
J

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