replace abandoned mail library

[Jumpy-Squirrel]

go-gomail/gomail#182

Our mail library is abandonware, and it currently only supports attachments from files, but we want to store base64 encoded attachments in the database / expose via API.

One possible alternative might be https://github.com/xhit/go-simple-mail

We will have to ensure to maintain backwards compatibility, maybe temporarily import both libraries.

Update:

There's now a maintained fork for our original library that also supports attachments from writers in-memory. Should cause fewer code changes. https://github.com/Shopify/gomail

We should try that first.

[Neustradamus]

@ItsSelis, @Jumpy-Squirrel: It is possible to change it?

• https://github.com/Shopify/gomail

It has been archived and there is a vulnerability:

• https://github.com/Shopify/gomail
• Where can I report vulnerabilities? Shopify/gomail#59

There are:

• https://github.com/xhit/go-simple-mail from @xhit
• https://github.com/wneessen/go-mail from @wneessen

Linked to:

• feat: Implements Shopify/gomail #61

[Jumpy-Squirrel]

@ItsSelis, @Jumpy-Squirrel: It is possible to change it?

* https://github.com/Shopify/gomail

It has been archived and there is a vulnerability:

Thank you for the heads up. See #118