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attach images in email #2784

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merged 2 commits into from
Oct 19, 2022
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stefan0xC
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@stefan0xC stefan0xC commented Oct 2, 2022

Since many email clients don't load external images I was wondering if we should include the images as attachment instead.

Some drawbacks to this change:

  • Embedding the images as attachments makes the mails around ~5kb bigger.
  • If you change the templates vaultwarden would still attach the images to the mail.

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It might be an option to add a new config option, SMTP_EMBED_IMAGES or something like that and have it dynamically embed or provide the external link.

The only thing is that the images are fully internal. So, if someone wants to change them it will not be easy besides for them to compile them selfs with a changed image file.

But in those cases someone probably wants to do more changes, so I'm not too worried about that.

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@stefan0xC stefan0xC marked this pull request as draft October 2, 2022 07:26
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It might be an option to add a new config option, SMTP_EMBED_IMAGES or something like that and have it dynamically embed or provide the external link.

Okay, I will look into that.

@stefan0xC stefan0xC marked this pull request as ready for review October 2, 2022 08:16
@stefan0xC stefan0xC force-pushed the email-attach-images branch 2 times, most recently from 7aaa41c to 8666adc Compare October 4, 2022 01:24
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mikepattyn commented Oct 5, 2022 via email

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BlackDex commented Oct 5, 2022

Put the images inthere as true svgs if possible, they are code so will render in email even without a request from the user

That probably isn't working for all clients, and probably suffers from the same issues as using a base64 image src, that some client's just block that by default without a way to show it at all.

CID is old, but still works.

@stefan0xC stefan0xC force-pushed the email-attach-images branch 4 times, most recently from 25c74e2 to e5c3ac7 Compare October 6, 2022 10:26
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stefan0xC and others added 2 commits October 15, 2022 04:59
Set SMTP_EMBED_IMAGES option to false if you don't want to attach images
to the mail.

NOTE: If you have customized the template files `email_header.hbs` and
`email_footer.hbs` you can replace `{url}/vw_static/` to `{img_url}`
to support both URL schemes
Apply suggestions from code review

Co-authored-by: Mathijs van Veluw <black.dex@gmail.com>
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Tested it and looks good to me.
It just needs an other re-base :)

@dani-garcia dani-garcia merged commit 4289663 into dani-garcia:main Oct 19, 2022
@stefan0xC stefan0xC deleted the email-attach-images branch October 19, 2022 20:22
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4 participants