thanks for the suggestion, but before trying a blown up solution, i thought i could try using the PNG or JPG of the logo, which i also have in this folder. so here is a little sum-up of all my tests, none of them worked, no matter if SVG/PNG/JPG:
SVG:
<img src="http://subdomain.domain.tld/templates/templatename/images/logo.svg" alt="logo" height="100" width="120"/>
<img src="/templates/templatename/images/logo.svg" alt="logo" height="100" width="120"/>
<img src="templates/templatename/images/logo.svg" alt="logo" height="100" width="120"/>
PNG<img src="http://subdomain.domain.tld/templates/templatename/images/logo.png" alt="logo" height="100" width="120"/>
<img src="/templates/templatename/images/logo.png" alt="logo" height="100" width="120"/>
<img src="templates/templatename/images/logo.png" alt="logo" height="100" width="120"/>
JPG<img src="http://subdomain.domain.tld/templates/templatename/images/logo.jpg" alt="logo" height="100" width="120"/>
<img src="/templates/templatename/images/logo.jpg" alt="logo" height="100" width="120"/>
<img src="templates/templatename/images/logo.jpg" alt="logo" height="100" width="120"/>
...also tried all combinations without the slash at the end,
...width="120"> because i read somewhere in your forum this might cause trouble = again, it doesnt work either...
so i can say it is not due to the fact that i was trying to use a SVG...
any idea?