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Re: Unreal Engine 5 SMTP Mail Sender with libcurl

From: Frozen Forest via curl-library <>
Date: Wed, 16 Aug 2023 00:44:05 +0300

My problem was header integration while using mime example.

as you can see in my gist, I commented out payloads and also used mimes.
I couldn't solve the problem until now.

Some reason, slist_append didn't append info from my header array. So, I
used same variables on append directly without \r\n at the end.

Currently it works as expected (mostly).
I just need to improve message body.

On Wed, Aug 16, 2023, 12:38 AM Ray Satiro via curl-library <> wrote:

> On 8/15/2023 7:56 AM, Frozen Forest via curl-library wrote:
> I have to send multiple attachments to* "To, Cc, Bcc" targets with proper
> mail subject.*
> If I use *payload_source *method, I can see subject and all recipients
> are in correct group but I can't attach any file.
> If I use *mime* method, I can't integrate my header to mail. So, I can
> send all my files correctly to all my recipients but there is no subject
> and Cc, Bcc groups.
> *my codes are in here. Header related functions start from 146*
> I integrated some into comments on the top to explain Unreal's workflow.
> If I solve this problem with your help, I will happily open my plugin to
> ecosystem as open source.
> If you are attaching files I suggest that you take a look at the smtp-mime
> example [1] rather than use payload_source (the CURLOPT_READFUNCTION used
> in some other libcurl smtp examples).
> [1]:
> --
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Received on 2023-08-15