The following table lists the trappable errors for the MAPI controls.
| Constant | Value | Description |
| mapSuccessSuccess | 32000 | Action returned successfully |
| mapUserAbort | 32001 | User canceled process |
| The current action was not completed because the user canceled the process. | ||
| mapFailure | 32002 | Unspecified failure has occurred |
| An unspecified error occurred during the current action. For example, the action was unable to delete or address mail correctly. | ||
| mapLoginFail | 32003 | Login has failed |
| There was no default logon, and the user failed to log on correctly. | ||
| mapDiskFull | 32004 | Disk is full |
| The disk is full. The current action could not create a disk file. | ||
| mapInsufficientMem | 32005 | Insufficient memory |
| There is insufficient memory to proceed with the current action. | ||
| mapAccessDenied | 32006 | Access denied. |
| mapGeneralFailure | 32007 | General Failure. |
| This is an unspecified error. | ||
| mapTooManySessions | 32008 | Too many sessions |
| The user has too many sessions open at once. | ||
| mapTooManyFiles | 32009 | Too many files |
| Too many file attachments are contained in the message. The mail wasn't sent or read. | ||
| mapTooManyRecipients | 32010 | Too many recipients |
| There are too many message recipients specified. Mail wasn't sent or read. | ||
| mapAttachmentNotFound | 32011 | Attachment not found |
| The specified attachment wasn't found, and mail wasn't sent. | ||
| mapAttachmentOpenFailure | 32012 | Failure on opening attachment |
| The attachment couldn't be located. Mail wasn't sent. Verify that the AttachmentPathName property is valid. | ||
| mapAttachmentWriteFailure | 32013 | Failure attempting to write an attachment |
| An attachment could not be written to a temporary file. Check directory permissions. | ||
| mapUnknownRecipient | 32014 | Unknown recipient |
| The recipient doesn't appear in the address list. Mail wasn't sent. | ||
| mapBadRecipType | 32015 | Invalid recipient type |
| The type of recipient was incorrect. Valid type values are 1 (primary recipient), 2 (copy recipient), and 3 (blind copy recipient). | ||
| mapNoMessages | 32016 | No messages |
| Unable to find the next message. | ||
| mapInvalidMessage | 32017 | Invalid message |
| An invalid message ID was used. The current action was not completed. | ||
| mapTextTooLarge | 32018 | Text is too large |
| The text in the message was too large to send. The mail wasn't sent. Text is limited to 32K. | ||
| mapInvalidSession | 32019 | Invalid session |
| An invalid session ID was used. To associate the MAPI messages control with a valid messaging session, set the SessionID property to the MAPI session control's SessionID. | ||
| mapTypeNotSupported | 32020 | Type not supported |
| mapAmbiguousRecipient | 32021 | Ambiguous recipient |
| One or more recipient addresses are invalid. Make sure the addresses for the RecipAddress property are valid. | ||
| mapMessageInUse | 32022 | Message in use |
| mapNetworkFailure | 32023 | Network failure |
| mapInvalidEditFields | 32024 | Invalid editfields |
| The value of the AddressEditFieldCount property is invalid. Valid values are from 0 to 4. | ||
| mapInvalidRecips | 32025 | Invalid Recipients |
| One or more recipient addresses are invalid. Make sure the addresses for the RecipAddress property are valid. | ||
| mapNotSupported | 32026 | Not supported |
| The current action is not supported by the underlying mail system. | ||
| mapSessionExist | 32050 | Logon failure: valid session ID already exists |
| The MAPI messages control is already using a valid session ID. | ||
| mapInvalidBuffer | 32051 | Property is read only when not using Compose Buffer. Set MsgIndex = –1 |
| mapInvalidReadBufferAction | 32052 | Action only valid for Compose Buffer. Set MsgIndex = –1 |
| mapNoSession | 32053 | MAPI Failure: valid session ID does not exist |
| The MAPI messages control does not have a valid session handle from the MAPI session control. | ||
| mapInvalidRecipient | 32054 | No originator in the Compose Buffer |
| You cannot see message originator information while in the Compose Buffer (MsgIndex set to –1). | ||
| mapInvalidComposeBufferAction | 32055 | Action not valid for Compose Buffer |
| The attempted action is not valid in the Compose Buffer (MsgIndex set to –1) | ||
| mapControlFailure | 32056 | Cannot perform action, no messages in list |
| mapNoRecipients | 32057 | Cannot perform action, no recipients |
| mapNoAttachment | 32058 | Cannot perform action, no attachments |