Ok I just tried the service since I want to migrate from Resend. Seems like you can only send email via the worker or REST API for now? Can I send via SMTP? I'm using Supabase and it needs the SMTP credentials. I can't find anything on the dashboard or on the docs, even though last year they said it supports SMTP [0] [0] https://blog.cloudflare.com/email-service/
Cloudflare Email Service
211–217 of 217 posts
Re: Cloudflare Email Service
#212Earlier quoted context omitted.
This has been possible for many years, before agents were a thing. They will open the mail and scan the contents into a pdf for you, requires filing a form with the post office. It gets expensive because they nickel and dime you where they can. There are many more services should you wish to send snail mail. https://www.virtualpostmail.com/
As an aside, this company's services seem incredibly sketchy - they let you have fake residential or commercial addresses so you can pretend to have a US office or other address
It's nice for remote companies or contractors so you don't have to use your home address. I'm sure there are sketchy companies in this niche, this was one of the top search results in 2026, not the one I used when I did this.
Re: Cloudflare Email Service
#213Earlier quoted context omitted.
Hashcash, or BTC.
I always loved the hashcash concept and actually raised our original funding because of it (our Microsoft angels loved the idea of making spamming more expensive, and our Series A concept was tar-pitting to dissuade botnets). In the context of email sending services, we have a modern version of hashcash that we might at some point turn to. If someone can figure out how to tokenize sending at scale, then senders could…
Wow, this brings back memories. Way back in the 2000 I worked on a concept to charge “postage“ to big senders and remit payments to receivers (hosts, not end users). I also looked at hashcash. I ultimately abandoned the project because I realized I would be spending all my time convincing big senders why they should pay and I knew I would hate that job.
Previously I was the spam cop for a big sender and saw up close all the ways our clients would try to weasel around it.
Re: Cloudflare Email Service
#214I wonder if they deliberately withheld SMTP sending to get better vendor lock. However, without SMTP support, the email sending service is mostly unusable.
Re: Cloudflare Email Service
#215Earlier quoted context omitted.
The pricing is disappointing. I'm surprised Cloudflare has not tried to compete on price against AWS lately after a good start with R2. Queues, database storage, database writes, worker invocation all more expensive than the AWS offering.
Can you back that up with a link? You're saying Lambda is cheaper than Workers?
I said worker/lambda invocation, $0.30/m cloudflare vs $0.20/m for lambda.
Total cost depends on async work and memory needs. Cloudflare is $20/m seconds, lambda is $1.66/m seconds, both at 128MB. lambda isn't giving you a full core, if you need CPU it is also $20/m.
Re: Cloudflare Email Service
#216Earlier quoted context omitted.
Can you back that up with a link? You're saying Lambda is cheaper than Workers?
I said worker/lambda invocation, $0.30/m cloudflare vs $0.20/m for lambda. Total cost depends on async work and memory needs. Cloudflare is $20/m seconds, lambda is $1.66/m seconds, both at 128MB. lambda isn't giving you a full core, if you need CPU it is also $20/m.
Ok so I guess lambda wins on per m requests and only if you're not using api gateway.
In the real world those wins get eaten up by all the other ways CF are better (free egress, no cold start, cpu-time only duration billing).
My verdict: Workers wins on price by a lot.
Re: Cloudflare Email Service
#217Ok I just tried the service since I want to migrate from Resend. Seems like you can only send email via the worker or REST API for now? Can I send via SMTP? I'm using Supabase and it needs the SMTP credentials. I can't find anything on the dashboard or on the docs, even though last year they said it supports SMTP [0] [0] https://blog.cloudflare.com/email-service/
I also found that to be the case (no REST API) which is a shame. I also wish I could use it with SendOps.dev like AWS SES.