In addition to the usual ways of communication with external users, you can send an email to them right from Feed.
Create Feed post and add recipients email addresses
To add external users to your Feed discussions, you need to send them an invitation by email. Just click Add more in the post recipients To section > Invite a guest:
Specify the external user's email address, first and last name. Then click Invite.
While all Bitrix24 users involved in the discussion will receive regular notifications, the external users invited by email will get an email message.
This message is generated according to the special template. Your company name will be displayed in the header, and the post content will be shown in the email message text. The external recipients will actually see the full Feed post content - post author, text, recipients, links, attachments.
Email recipients can instantly reply to the email message to leave a comment.
Also, email users can click Add Comment button. In this case, they will be taken to a special secure web page that resembles Bitrix24 Feed post, rather than your Bitrix24 account - this is done for security purposes. Here your clients, partners and other external users can add their comments to your discussion, send links, share files, etc. You will see these inside your Bitrix24 account.
The external comment lands into your Bitrix24 Feed as a usual comment:
The external recipient will be notified about all new comments to this post by email. If the subject requires further discussion, the external user can stay on the web page and have a real-time communication with you and your colleagues.
Add new recipients to the post discussion
Another scenario is when you are already in the middle of discussion in your Bitrix24 Feed and need to invite a new external user to the post. Click More button > Add recipients for this purpose.
Invite another external user as a guest by the way described above. The user will get an email with your comment and will be able to access full post history in a new web page.
mail-001.bitrix24.com to your Bitrix24 account domain. To do that, contact your domain administrator. Other Bitrix24 Cloud plans users don't need to do that.