html email design for gmail – doesn't show images - css

Question

I'm designing a email template and test it on various clients including gmail.
Gmail just won't display the images though. Don't tell me gmail doesn't support it cause I'm getting images all the time.
The logo is of course in the html code, not css.
Here's my code for the header-table:
<table align="center" border="1" cellpadding="0" cellspacing="0" style="border-collapse: collapse; line-height: 1.5em;">
<tr>
<td>
<p>
<img style="display: block; margin: auto;" align="center" alt="Example logo" src="http://example.com/media/images/email/example-logo.png"/>
</p>
</td>
</tr>
</table>
Any suggestions?

Answer 1

you have mistake
alt="Example" logo"
This html must work
<table width="100%" cellspacing="0" cellpadding="0" border="0" bgcolor="#fefefe">
<tr>
<td align="center">
<table width="700" cellpadding="0" cellspacing="0" border="0" style="border-collapse: collapse;">
<!--header starts-->
<tr>
<td align="center" width="100%"><img src="http://siteurl.com/logo_beta.png" alt="Company Logo" /></td>
</tr>
<tr>
<td align="left">
<p><strong><font size="2.5" face="Times New Roman, Arial, Helvetica, sans-serif">Hi User!</font></strong>
</p>
</td>
</tr>
<tr><td><span><br></span></td></tr>
<!--header ends-->
<!--content starts-->
<tr>
<td colspan="3" align="center">
<table width="700" cellpadding="0" cellspacing="0" border="0" style="border-collapse: collapse;">
<!--Table Content-->
</table>
</td>
</tr>
<!--content ends-->
<!--fotter starts -->
<tr>
<td align ="left">
<p><strong><font size="2.5" face="Times New Roman, Arial, Helvetica, sans-serif">Thanks<br>
With best wishes, Company</font></strong>
</p>
</td>
</tr>
</table>
</td>
</tr>
</table>

Answer 2

Gmail automatically shows you the images in your messages. If you have a slow Internet connection or limited mobile data, you may want to change your setting so that Gmail asks you before showing images.
Note: This is the reason we shouldn't depend on images. Better way is
to use the style alt text so if images is blocked by email provider due to low internet connection or due to security issue a mail still
should work.
Gmail scans every message for suspicious content and if Gmail considers a sender or message potentially suspicious, images won’t be displayed and you’ll be asked whether you want to see the images.
Actual content is from gmail support.