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Let's Encrypt starting to send out more invites - just got one
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Let's Encrypt starting to send out more invites - just got one

zeitgeistzeitgeist Member
edited October 2015 in General

From Let's Encrypt:

Currently we've whitelisted 2935 domains, out of more than 95238 in the current beta signup list (number from 24 Oct). While admittedly that's only 3%, it's an interesting game to see how many of those invitations turn into certificate issuances - as you pointed out, there are so far only 203 certificates issued. We'll be doubling that number of whitelisted domains tomorrow.

The invite mail:

Greetings from Let's Encrypt, alex.

Thank you for your interest in our beta program! We're excited to let you know that your domains (below) have been whitelisted, and you can now utilize an ACME client to obtain a certificate for them.

Quick Start
To use Let's Encrypt's official client to obtain your real certificates, you will need to provide the production API URL on the command line:
When running the Python client (installation directions [1]), be sure to specify the --server argument with the production URL:

git clone cd letsencrypt ./letsencrypt-auto --agree-dev-preview --server \ auth
If you are using a different ACME client, be sure to configure it to use the production URL in order to get valid certificates. Many clients will default to the staging URL.

Known Issues
There are some known issues with the official Python client posted here:

Renewals and Lifetimes
Certificates from Let's Encrypt are valid for 90 days. We recommend renewing them every 60 days to provide a nice margin of error. As a beta participant, you should be prepared to manually renew your certificates at that time. As we get closer to General Availability, we hope to have automatic renewal tested and working on more platforms, but for now, please play it safe and keep track.

Rate Limiting
During this beta test we have very tight rate-limiting in place. We plan to loosen these limits as the beta proceeds.

There are two rate limits in play: Registrations/IP address, and Certificates/Domain.

Registrations/IP address limits the number of registrations you can make in a given week; currently 2. This means you should avoid deleting the /etc/letsencrypt/accounts folder, or you may not be able to re-register.

Certificates/Domain you could run into through repeated re-issuance. This limit measures certificates issued for a given combination of Top Level Domain + Domain. This means if you issue certificates for the following domains, at the end you would have what we consider 4 certificates for the domain
The limit on Certificates/Domain has a window of 90 days - the same as our certificate lifespans. We know it's restrictive at present; thank you for your patience in helping us ensure Let's Encrypt is ready for the whole world.
Certificate Transparency
Part of our transparency mission includes publicly disclosing the certificates we issue via Certificate Transparency. Your email address is not publicly disclosed.

Helpful Information
Let's Encrypt maintainence events are posted on and Twitter (@letsencrypt_ops). If you need help, both the Let's Encrypt community at and #letsencrypt on are excellent sources of assistance.

If there are updates for Beta program participants, they will be posted at the community site at

Your whitelisted domains are:


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