GMail not showing inline-images (cid) i'm sending with System.Net.Mail
问题 When I send an email via outlook or gmail to a gmail email address I can add inline-images which are directly shown in the gmail webinterface: Relevant raw mail-header and raw body parts of the working email: --089e0158b6909948880520cef593 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable <div dir=3D"ltr">Image there?<div><img src=3D"cid:ii_if3zqhar0_15014363be0a= 41b2" width=3D"10" height=3D"3"><br>=E2=80=8BHope so!<br></div></div> -