Hot answers tagged blocking-access
Yes, because user1 has a public account and has a setting to receive message from anyone. So user2 can send direct message to user1 even if user1 doesn't follow user2. But user2 will not be able to send message if user1 has a setting to not receive message from anyone or only whom I follow.
You will need to send an SMS to Twitter shortcode Twitter via SMS FAQs Tweeting via text message Twitter's supported mobile carriers
Only top voted, non community-wiki answers of a minimum length are eligible