1. What is the Mailing list subscription service?The Mailing list subscription service enables members to self subscribe/unsubscribe to the different ITU-T Study Groups mailing lists. This service is available at:
https://www.itu.int/ITU-T/services.
2. Who can subscribe to a mailing list?To subscribe to mailing lists, you need an
ITU User AccountPlease note that self subscription to most ITU-T mailing lists is available only to
ITU-T members with a TIES access. User accounts without TIES access are limited and subscription will require approval from the service owner (Study Group secretariat, Focus Group secretariat, etc.).
3. What is TIES Access?
TIES access is provided, on demand, to staff from ITU Members (Member States, Sector Members, Associates, and Academia). TIES provides personalized access to a number of services. TIES services are provided to support the participation of Members in the activities of the Union and include online collaboration tools, access to ITU meeting documents, automatic email notifications, etc.
4. With what e-mail address am I subscribed to the mailing list?Your main contact (login) e-mail address is automatically subscribed and becomes the default subscription e-mail when you join a mailing list. Messages from the mailing lists are sent to your contact (login) e-mail address by default.
5. Can I use a dedicated email for mailing lists?You can use a different email that will be used for mailing lists purposes only.
Step 1 – Access Your Profile
2. Click on your profile icon in the top-right corner of the screen.
3. From the dropdown menu, select Profile.
Step 2 – Edit Profile Information
1. Click the Edit button on the right side of the profile page.
2. In the Mailing list email field, update the email address as needed.
3. Click Save to apply the changes.

Additional Information - This change will be automatically reflected in all of your mailing list subscriptions.
- This procedure might take up to 1 - 2 hours to be fully completed.
6. How do I subscribe to a mailing list? - Go to the ITU-T Electronic Registration and Subscription Service page.
- Click on the “Login” button and identify yourself with your ITU User Account.
- Once logged in, the Service Catalog of all available services will be displayed according to groups.
- Depending on the group you select under the Service Catalog tree, services which are open for subscription will be displayed under the Services Open for Subscription tab.
- To subscribe, simply tick on the check box next to the service and click on the Subscribe/Request subscription button.
- Depending on your ITU membership, you will be automatically subscribed to the service or your request will be sent to the service owner for approval.
- Shortly afterwards you will receive an e-mail confirmation to your default e-mail address.
Note:
- The subscription procedure might take up to 30 minutes to be fully completed.
7. How do I unsubscribe from a mailing list? - Go to the ITU-T Electronic Registration and Subscription Service page.
- Click on the “Login” button and identify yourself with your ITU User Account.
- Select from the Service Catalog tree the group where the mailing list you want to unsubscribe to belongs. The mailing list you are subscribed to will be displayed under the Active Subscriptions tab.
- To unsubscribe, simply tick on the check box next to the service and click on the Unsubscribe button.
- Shortly afterwards, you will receive an e-mail confirmation that you have been unsubscribed.
8. How do I find out which e-mail mailing lists I have subscribed to? - Go to the ITU-T Electronic Registration and Subscription Service page.
- Click on the “Login” button and identify yourself with your ITU User Account.
- Depending on the group you select under the Service Catalog tree, services which you are subscribed to will be displayed under the Active Subscriptions tab.
9. How can I see the e-mail address that I use for the mailing lists?
10. How do I access the mailing lists archives?Using your TIES account, the mailing list archives can be accessed directly through:
http://www.itu.int/ml/lists/arc/%listname% where %listname% should be replaced by the corresponding mailing list name.
Example: For the mailing list t25sg21all@lists.itu.int the archive is http://www.itu.int/ml/lists/arc/t25sg21all.
11. How do I send e-mails to a mailing list?Simply send the mail you want to be distributed to the mailing list address (ex. t25sg21all@lists.itu.int). Mail sent to that address will automatically be picked up and redistributed to the mailing list subscribers. Note that senders who write to multiple mailing lists will receive replies from only one of them. This is to prevent spamming senders.