mastodon.social is one of the many independent Mastodon servers you can use to participate in the fediverse.
The original server operated by the Mastodon gGmbH non-profit

Administered by:

Server stats:

354K
active users

DMs work a bit differently on Mastodon. To send someone a message:

1. Go to where you normally write a post, but select the "Mentions/Mentioned" visibility mode, usually indicated by an @ symbol

2. @ the people you want to see the message

3. Write the message and publish it

NOTE: Everyone who is @-ed in a post or reply will see that post or reply. Be careful who you @ on here!

For more info on choosing post visibilities, see here: fedi.tips/who-can-see-my-posts

fedi.tipsWho can see my posts and replies in Mastodon? How do I choose post visibility settings? How do I send DMs in Mastodon? | Fedi.Tips – An Unofficial Guide to Mastodon and the Fediverse
More from Fedi.Tips
msmmwelch

@feditips
I found the @ symbol under the globe symbol in my new post dialog box.