SMTP Node - Send Images as Attachment

Questions
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1

Describe the problem/error/question

Dear community,
we are trying so send images as attachment using the smtp node. Unfortunatelly the attachments are not shown as valid attachments on receiver side. It works when using other binaries like e.g. zip files or pdfs. The problem only occurs when sending the email as html. When sending it as plain text it works as expected. The binary somehow seams to be within the mail, because the size of the mail matches the content including attachment.

Thanks for helping out.

What is the error message (if any)?

There are no error messages, email is send, but attachments are not seen on receiver side.

Please share your workflow

image
image1174Ă—254 19.7 KB

Share the output returned by the last node

Information on your n8n setup

  • n8n version: 1.123.6
  • Database (default: SQLite):
  • n8n EXECUTIONS_PROCESS setting (default: own, main):
  • Running n8n via (Docker, npm, n8n cloud, desktop app): n8n cloud
  • Operating system:
2

Hey @fwerkmeister !

Can you share an image age with the output of HTTP node and the SMTP how you configure and see the images there?

Somehow the file extension is not beeing passed further…

Cheers!

3

Hi @Parintele_Damaskin,

thanks for having a look. Here are the screenshots:

HTTP Node Output:

image
image639Ă—605 34.2 KB

Input of SMTP Node:

image
image515Ă—614 32 KB

Configuration (Attachment)

image
image489Ă—524 15 KB

Regards,

Felix

4

Hmmm… weird .

The receiiving mail clientt likkely formatting the image data using the content-disposition inline header instead of attachmentt…

5

Hi @Parintele_Damaskin,

do you think this is a bug within the smtp node? Actually there’s not much to change from configuration or workflow side.

6

Hey @fwerkmeister !

If you tell me the client that is receiving the email(Google etc…) maybe I can try reproduce it as well.

Can you share the exact SMTP node with your configurations?

Cheers!

7

Hi @Parintele_Damaskin ,

the client is outlook. The email is send through an self hosted exchange server (I don’t have details, just got the connection params). But I just send the email to my gmail address and gmail obviously detects the attachment.

image
image782Ă—384 71.1 KB

And here is the configuration of the “Send email” node.

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image489Ă—931 31.6 KB

Regards,
Felix

8

Then we are in the same boat :ship: :man_rowing_boat: in the ocean lol… and I can’t reproduce that.

But gmail seems to work OK, then the configuration for your specific case it doesn’t… sorry my friend, can’t help further :cry:…

Cheers!

9

Understood… Anyway, thanks for your help and merry christman :wink:

10

I have the same issue. The culprit is this:
Content-ID:
Content-Disposition: inline;

If the Content-ID is removed and the Content-Disposition is set to attachment it works. I found this open issue on github: