Email switch

I bet you need to send emails in almost any kind of projects. SaaS or just marketing page with "subscribe to newsletter".

And that's where things go interesting.

I provide EmailSwitch class, which will manage several email services. You get benefits:

• higher chance of delivering email: if 1 service fails, use another one
• more free plan resources 😉

Code example:

var email = new EmailSwitch(
    new EmailService(new Resend("resend-api-token"), new DayLimiter(100)),
    new EmailService(new Brevo("brevo-api-token"), new DayLimiter(300)),
    new EmailService(new SendGrid("send-grid-api-token"), new DayLimiter(100))
);

var sent = await email.Send("romankoshchei@gmail.com", "Roman Koshchei",
	to: ["roman@flurium.com"],
    subject: "I own Flurium",
    text: "Hi me from flurium account!",
    html: "<h1>Hi me from flurium account!</h1>"
);

Console.WriteLine(sent switch
{
    EmailStatus.Success => "Success",
    EmailStatus.LimitReached => "Limits are reached",
    _ => "Can't send an email"
});

EmailSwitch implements same interface as email senders. I highly recommend using at least 2 services to be unstoppable.

Support

	Link	Tested
Resend	resend.com	yes
SendGrid	sendgrid.com	yes
Brevo	brevo.com	yes
Mailjet	mailjet.com	no

Inspiration

I saw Hyperswitch on a trending list in GitHub long time ago and kept an eye on it. It's a switch for payments. Basically allowing support of different payments methods and processors.

While developing Spentoday, I decided to do same thing but for emails. It was a StartUp and I wanted to spend 0 money on infrastructure. So I just used free limits from Resend, Send Grid and Brevo to send our emails.

We actually didn't need so much, but surely EmailSwitch will be useful in future.

Templating

As you have seen above in a Code Example in Send method there is argument html. So you can send not only text, but html as well if email client supports showing html.

Writing 2 versions: text and html by yourself is kind of annoying. Moreover not all html and css is supported in emails.

So in future I plan to create an Email Templating inspired by React Email. React Email gives you components that will generate html suitable for email clients.

Code Example how I see it:

var email = Html(
	Button("Click me").Href("https://example.com").Style("color: #6366f1")
).Lang("en");

var html = email.RenderHtml();
var text = email.RenderText();