My b2evolution Version: 3.3.3 stable

Email posting runs fine when run from browser, but the sysop at the server cannot seem to get the settings right.. it fails with this msg

"X-Powered-By: PHP/5.2.6
Set-Cookie: cookieb2evosession=2376_IjHNw6CkGS3Yax0QB1YGWm3jTnGrpduU; expires=Mon, 15-Jun-2020 03:35:40 GMT; path=http:///blogs/
Content-type: text/html

Cannot post, please correct these errors: Found invalid URL: Invalid URL format (http:///blogs/media/blogs/a/hpim1675-1-9.jpg)";

I would appreciate any advice that I may pass to the host..

Many thanks