Email sending queue

[poVoq]

Requirements

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• Did you check to see if this issue already exists?
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• Is this a backend issue? Use the lemmy-ui repo for UI / frontend issues.
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Is your proposal related to a problem?

It seems like our instance is running into rate-limits with the external SMTP account that we use for sending out emails.

While this isn't a huge issue for now, it does seem to make password reset requests fail quite often. The error response in lemmy-ui is also not very good on that meaning that most people will not just try again a bit later.

Describe the solution you'd like.

I think the best solution is to introduce some sort of sending throttle and add a queue for sending such emails.

Thanks.

Describe alternatives you've considered.

Use a local email sending software, but many ISPs block outgoing emails and in general such emails usually end up in the spam filter.

Of course there are also professional providers for mass sending of emails, but those usually cost extra and might not be easily GDPR compatible.

Additional context

No response