I’m trying to use Mailgun with PHP to forward emails for my users. They can mask their email address, which is cool. But I’m stuck on how to deal with inline images. Right now, they show up broken in the forwarded emails.
I’ve checked Mailgun’s docs, but they’re not super helpful. I can attach images fine using the attachment parameter, but they just end up at the end of the email as downloads. That’s not what I want.
I’ve tried using the inline parameter too, but it’s not working as expected. The images are still broken in the email body, even though I can download them separately.
Here’s what I’ve got to work with:
The _POST array with stuff like attachment count and content-id-map
The _FILES array with details about each attachment
I’ve tried a bunch of things:
Using both inline and attachment parameters
Messing with the cid: part in the image source
Trying different file paths and names
Nothing’s working the way I want. The emails send fine, but the inline images are always broken. No errors, just not displaying right.
Anyone know how to get this working properly? I’m lost and could really use some help!
I’ve dealt with this exact issue before, and it can be frustrating. The key is to properly handle the Content-ID (CID) of the inline images. Here’s what worked for me:
Extract the CID from the original email’s content-id-map.
For each inline image, create a new CID by appending a unique identifier to the original filename.
When forwarding the email, use the inline parameter for each image, setting the new CID as the key.
In the HTML body, replace the original cid: references with the new CIDs you created.
It’s a bit of work, but it ensures the inline images display correctly in the forwarded email. You might need to do some regex magic to find and replace the CID references in the HTML.
Also, make sure you’re sending the email as multipart/related. This is crucial for inline images to work properly.
Hope this helps! Let me know if you need more specific code examples.
hey, i’ve been there too. it’s a pain, right? here’s what worked for me:
grab the cid from the content-id-map. make new cids for each image. use ‘inline’ when sending with mailgun, new cid as the key. update the html to use these new cids.
oh, and don’t forget multipart/related. that’s super important.
Having grappled with this issue myself, I can tell you it’s all about handling the Content-ID (CID) correctly. The trick is to maintain the relationship between the inline image and its reference in the HTML body.
Here’s what you need to do:
Extract the original CID from the content-id-map in your POST data. Generate a new unique CID for each inline image. Use the ‘inline’ parameter when sending via Mailgun, with the new CID as the key. Most importantly, update the HTML body to reference these new CIDs.
Don’t forget to send the email as multipart/related. This is crucial for inline images to render properly.
It’s a bit fiddly, but once you get it right, your inline images should display perfectly in the forwarded emails. Let me know if you need more specific guidance on implementation.