Random triples
| Subject | Object |
|---|---|
| gptkb:Yahoo!_Mail | Email tracking features available |
| gptkb:Yahoo!_Mail | Read receipts feature |
| gptkb:Google_Mail | no |
| gptkb:GMX_Mail | delivery notifications |
| gptkb:Yahoo!_Mail_Pro | Read receipts available |
| gptkb:AOL_Mail | Read receipts |
| gptkb:Yandex_Mail | not available |
| gptkb:GMX_Mail | read receipts |