Problem viewing included pictures [SOLVED]

ℹ️ Support
1

Hi there!

Since about 2 weeks i have a problem viewing pictures in html-mails:

When i view the message in Thunderbird (Linux and Win 11), there is only a placeholder for the picture.

Screenshot_thunderbird
Screenshot_thunderbird684×792 13.4 KB

When i view this message in my Roundcube webmailer, all is fine an the picture is shown immediately.

At the moment i have no idea what’s going wrong, but because my users have the same problem it’s not so funny!

I really hope someone has an idea to solve this!

Thanks in advance,

Mike

2

This is the view in Roundcube:

Screenshot_roundcube
Screenshot_roundcube697×898 234 KB

Here all is absolutely fine!

3

@Mike_S If you view the html source of the email in Thunderbird does the src attribute of the img element look correct?

4

Hi duncanc!

I hope this is the right thing:

<img src=3D"cid:40babc34a61ec99ba331f990ecb43836" title=3D=
“powered by phpList version 3.6.8, © phpList ltd” alt=3D"powered by ph=
pList 3.6.8, © phpList ltd" border=3D"0" />

And short after this follows:

–b2_IHlwll51EWfUenm6bYqib12U3FGmm9IzAG2LRwDZ38
Content-Type: image/png; name=powerphplist.png
Content-Transfer-Encoding: base64
Content-ID: <40babc34a61ec99ba331f990ecb43836>
Content-Disposition: inline; filename=powerphplist.png

iVBORw0KGgoAAAANSUhEUgAAAEsAAAAhCAYAAACRIVbWAAAABHNCSVQICAgIfAhkiAAAAAlwSFlz
AAALEgAACxIB0t1+/AAAAB50RVh0U29mdHdhcmUAQWRvYmUgRmlyZXdvcmtzIENTNS4xqx9I6wAA
DmhJREFUaIHtmntw1FWWxz+/Xz/T6aQTQgIkJgR5LGRIFDcPsSAEWEFkZSIisPIcRaTKEkEMwUGX
RRaZWlSylKPrqBDFGCXyUAqiKLUg6ADBhCRAEGQhWU1IIpru9Lt/j/2jkx/ppEOwZmoetX6rurrv
45x77/fec+65t69AN4zOyMgDFgP5gK17+f8D2IG9QPGZmprDqqpqBULnj9EZGTFAMfDrv3Tv/obx

and much more…

So i think, that the original picture is included via base64?!

5

@Mike_S That is the “powered by phplist” image. Look for the image that you included in the email. It should appear earlier in the source of the email.

6

Ok, pls have a look at the source of the mail:

Source

7

@Mike_S This is the image in the email

https://newsletter.fleischerei-clausen.de/uploadimages/image/Menu-25.07.-06.08.jpg

If I try to display that in Firefox or Chrome it is rejected because the server’s certificate expired on 15 June, which probably explains why the problem has been happening for a few weeks.

You need to raise this problem with the system administrators, who need to renew the certificate.

8

Hi duncanc!

Thanks! This was the right hint!

My let’s encrypt certificate has expired and after renewing it all is fine!

You make me happy :wink:

Greetings,

Mike