ErrLookup › jstedfast/MailKit
jstedfast/MailKit
A cross-platform .NET library for IMAP, POP3, and SMTP. · C# · 365 source files
Analyzed at 9d3859a785 on 2026-09-15. 288 documented errors.
| Code / Message | Type | Severity | Tags |
|---|---|---|---|
| The SearchOptions.All flag cannot be combined with a… | exception | error | argument-validation, mailkit, search, conflicting-options |
| QRESYNC needs to be enabled immediately after… | exception | error | imap, qresync, invalid-state-transition, mailkit |
| The Pop3Client has not been authenticated. | exception | error | pop3, mailkit, authentication, state-error |
| The folder does not support partial searches. | exception | error | mailkit, not-supported, search, partial-range |
| Failed to negotiate authentication method with the proxy… | exception | error | network, socks5, proxy, authentication |
| Unexpected response from server | exception | error | pop3, mailkit, protocol-error, network |
| No credentials could be found for the POP3 server. | exception | error | pop3, mailkit, credentials, authentication |
| Unknown URI scheme. | exception | error | mailkit, uri, scheme, connection |
| Failed to connect to | exception | error | socks5, proxy, connection |
| Specified argument was out of the range of valid values. | exception | error | ntlm, argument-out-of-range, mailkit |
| Value cannot be null. (Parameter 'name') | validation | error | argument-null, imap, acl, mailkit |
| The IMAP server does not support the ESEARCH extension. | exception | error | imap, mailkit, not-supported, esearch, server-capability |
| The ImapFolder does not support annotations. | exception | error | imap, mailkit, not-supported, annotations, capability-check |
| One or more of the uids is invalid. | validation | error | mailkit, imap, uid, argument-exception |
| offset | validation | error | argument-exception, hash, out-of-range, md4 |
| The ANNOTATION search term is not supported by the IMAP… | exception | error | imap, search, capability-check, annotate |
| The IMAP server did not return the requested body part. | exception | error | imap, mailkit, message-not-found, fetch |
| The uid is invalid. | exception | error | imap, argument-validation, mailkit, uid |
| format, args | exception | error | mailkit, imap, protocol-error, unexpected-token |
InvalidChallenge Challenge contained an invalid nonce. | error_code | error | sasl, scram, authentication, nonce, security, mailkit |
| The ImapClient is not connected. | exception | error | imap, mailkit, connection-state, network |
| You must enable UTF-8 mode before authenticating. | exception | error | pop3, utf8, state-machine, mailkit, ordering |
IncorrectHash Server response did not contain the expected hash. | error_code | error | sasl, digest-md5, authentication, hash |
| The IMAP command queue is empty. | exception | error | concurrency, imap, race-condition, threading |
| The IMAP server did not return the requested message… | exception | error | imap, message-not-found, mailkit, server-response |
| HashAlgorithm | validation | error | csharp, disposed-object, hashing, ntlm |
| keywords | exception | error | argument-null, imap, append, mailkit |
| The IMAP server did not return the requested body part… | exception | error | imap, message-not-found, mailkit, bodypart |
| The IMAP server does not support negative partial ranges. | exception | error | imap, mailkit, not-supported, partial-range, rfc9394 |
| The ImapFolder does not support mod-sequences. | exception | error | imap, mailkit, not-supported, modseq, condstore, fetch |
| The POP3 server does not support the STLS extension. | exception | error | pop3, tls, starttls, mailkit, capability-negotiation |
| Capabilities cannot be enabled, they may only be disabled. | validation | error | smtp, capabilities, setter |
| One or more messages is missing information needed for… | exception | error | csharp, mailkit, sorting, imessagesummary, fetch-fields |
| The POP3 server does not support the UIDL extension. | exception | error | pop3, uidl, uid, capability, mailkit |
| The set of unique identifiers is too large to fetch with a… | exception | error | imap, mailkit, not-supported, partial, uid-limit, fetch |
| The SAVEDATESUPPORTED search term is not supported by the… | exception | error | imap, search, capability-check, savedate |
| The IMAP server does not support the Google Mail extensions. | exception | error | imap, mailkit, gmail, labels, not-supported |
| The socket is not connected. | validation | error | smtp, socket, argument-validation, connection |
| The FILTER search term is not supported by the IMAP server. | exception | error | imap, search, capability-check, dovecot |
| The IMAP server does not support the NOTIFY extension. | exception | error | imap, notify, capability, mailkit |
| The LOGIN command is disabled. | exception | critical | imap, login-disabled, tls, authentication, mailkit |
| index | validation | error | imap, argument-out-of-range, mailkit, sequence-index |
| The IMAP server does not support the PARTIAL extension. | exception | error | imap, mailkit, not-supported, partial-range, server-capability |
| The POP3 server has unexpectedly disconnected. | exception | error | pop3, network, disconnection, timeout, mailkit |
| The SAVEDBEFORE search term is not supported by the IMAP… | exception | error | imap, search, capability-check, savedate |
| contentType | exception | error | mailkit, null-argument, mime, bodystructure |
| The SmtpClient must be connected before you can… | exception | error | smtp, mailkit, connection-state, authentication |
| Cannot search for an empty set of unique identifiers. | validation | error | mailkit, imap, argument-validation, empty-collection |
| section | validation | error | imap, mailkit, null-argument, bodypart |
| The Pop3Client is already connected. | exception | error | pop3, mailkit, already-connected, invalid-state |
| No compatible authentication mechanisms found. | exception | error | smtp, mailkit, sasl, mechanism-negotiation |
| count | validation | error | argument-validation, mailkit, imap, range |
| Invalid part-specifier in annotation entry. | validation | error | imap, annotations, format-exception, parser |
| inputBuffer | validation | error | argument-exception, null, crypto, transformblock |
| The FUZZY search term is not supported by the IMAP server. | exception | error | imap, search, capability-check, fuzzy-search |
| The IMAP server does not support the METADATA extension. | exception | error | imap, metadata, unsupported-feature, capability-check |
| The YOUNGER search term is not supported by the IMAP server. | exception | error | imap, search, capability-check, within |
| visitor | exception | error | null-reference, visitor-pattern, argument-validation, mailkit |
| The default system proxy does not support | exception | error | proxy, network, unsupported-scheme |
MissingChallenge Server response did not contain any authentication data. | error_code | error | sasl, ntlm, authentication, mailkit |
MessageNotAccepted No recipients were accepted. | error_code | error | smtp, recipients, send, async |
| No credentials could be found for the IMAP server. | exception | error | imap, credentials, authentication, mailkit |
| The OLDER search term is not supported by the IMAP server. | exception | error | imap, search, capability-check, within |
| Operation timed out after | exception | error | network, timeout, socket, mailkit |
| Indexes and '*' cannot be used while… | exception | error | imap, mailkit, notify-extension, sequence-numbers |
| Only message events may be specified when SELECTED or… | exception | error | imap, notify, rfc5465, validation |
| The IMAP server has unexpectedly disconnected. | exception | critical | imap, mailkit, network, connection-dropped, protocol-exception |
| part | validation | error | imap, null-argument, mailkit, argument-validation |
| The IMAP server did not return the requested message. | exception | warning | imap, message-not-found, race-condition, mailkit |
| Literal token length | exception | error | imap, protocol, literal, size-limit |
| The host address must be an IPv4 or IPv6 address. | validation | error | socks5, argument, ip-address |
| The MessageNew event cannot have any parameters for mailbox… | exception | error | imap, notify, rfc5465, validation |
| bodyParts | exception | error | null-reference, constructor, argument-validation, mailkit |
| Metadata tag does not reference a valid filter. | validation | error | csharp, mailkit, imap, metadata, search-query |
| UTF8=ACCEPT needs to be enabled immediately after… | exception | error | imap, utf8, invalid-state-transition, mailkit |
| One or more of the indexes are invalid. | validation | error | pop3, argument-validation, index-out-of-range, mailkit |
| Failed to resolve host | exception | error | dns, network, smtp, resolve |
| The length of the host name must be between 0 and 256… | validation | error | proxy, argument-validation, configuration, mailkit |
| inputOffset | validation | error | argument-exception, crypto, out-of-range, transformblock |
| outputOffset | validation | error | argument-exception, crypto, out-of-range, transformblock |
SmtpStatusCode.TransactionFailed No recipients were accepted. | exception | error | smtp, mailkit, recipient-rejected, transaction-failed |
| inputCount | validation | error | argument-exception, crypto, out-of-range, transformblock |
| Unexpected TAG value in untagged ESEARCH response: | exception | error | imap, protocol-violation, esearch, server-bug |
| The host name cannot be empty. | validation | error | pop3, mailkit, empty-string, argument-validation |
| Invalid status code returned by the server. | exception | error | smtp, protocol, status-code, server-reply |
| One or more annotations does not define any attributes. | validation | error | imap, argument-validation, annotations, mailkit |
| The X-GM-MSGID search term is not supported by the IMAP… | exception | error | imap, gmail, capability-check, not-supported |
| The SMTP server has unexpectedly disconnected | exception | error | smtp, mailkit, network, disconnection |
| Invalid Type message. | exception | error | ntlm, signature, mailkit |
| LOGIN does not support SASL-IR. | exception | error | sasl, login, sasl-ir, mailkit |
| partSpecifier | exception | error | mailkit, null-argument, imap, bodystructure |
| The Pop3Client must be connected before you can… | exception | error | pop3, mailkit, connection, state-error |
| Value cannot be null. (Parameter 'rights') | validation | error | argument-null, imap, acl, mailkit |
| Value cannot be null. | exception | error | sasl, argument-null, credentials, mailkit |
| message | exception | error | argument-null, event-args, authentication, mailkit |
| The SAVEDON search term is not supported by the IMAP server. | exception | error | imap, search, capability-check, savedate |
| Unexpected greeting from server | exception | error | pop3, protocol-error, connection, greeting, mailkit |
| uri | exception | error | null-reference, argument-validation, mailkit |
IncompleteChallenge Challenge did not contain a salt. | error_code | error | sasl, scram, authentication, mailkit |
| MD4 | validation | error | object-disposed, hash, lifetime, md4 |