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| HTTP, Forms | SOAP | REST | SMTP+ | FTP | List+ | Frontend | |
|---|---|---|---|---|---|---|---|
| Import recipient (single) |  | | |  1 | 2 | ||
| Import of recipients (bulk) | | | | 3 | |||
| Bulk import limit (Mega Bytes MB of data) | MailUpImport : Multiple import by splitting in blocks, SendMessageNL: as FTP case | Multiple import by splitting in blocks, up to 7 MB per block | N/A, but successfully tested either with 50 MB or with a single import file containing 4 millions email addresses | 10 MB | |||
| Force optin of unsubscribed recipient (single) | | 2 | | 2 | |||
| Force optin of unsubscribed recipients (bulk) | | | |||||
| Unsubscribe recipient (single) | | | | 2 | |||
Unsubscribe recipient (bulk) | | | |||||
| Read personal data fields settings | | | |||||
| Update recipients' personal data fields | | | | | |||
| Check recipient's subscription status | | | |||||
| Add to group (single) | | | | 2 | |||
| Add to group (bulk) | | | | ||||
| Remove from group (single) | | ||||||
| Remove from group (bulk) | 4 |
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