MailKit 3.0.0
MailKit is an Open Source cross-platform .NET mail-client library that is based on MimeKit and optimized for mobile devices.
Features include:
* HTTP, Socks4, Socks4a and Socks5 proxy support.
* SASL Authentication via ANONYMOUS, CRAM-MD5, DIGEST-MD5, LOGIN, NTLM, OAUTHBEARER, PLAIN, SCRAM-SHA-1, SCRAM-SHA-256, SCRAM-SHA-512 and XOAUTH2.
* A fully-cancellable SmtpClient with support for STARTTLS, 8BITMIME, BINARYMIME, ENHANCEDSTATUSCODES, SIZE, DSN, PIPELINING and SMTPUTF8.
* A fully-cancellable Pop3Client with support for STLS, UIDL, APOP, PIPELINING, UTF8, and LANG.
* A fully-cancellable ImapClient with support for ACL, QUOTA, LITERAL+, IDLE, NAMESPACE, ID, CHILDREN, LOGINDISABLED, STARTTLS, MULTIAPPEND, UNSELECT, UIDPLUS, CONDSTORE, ESEARCH, SASL-IR, COMPRESS, WITHIN, ENABLE, QRESYNC, SORT, THREAD, ANNOTATE, LIST-EXTENDED, ESORT, METADATA / METADATA-SERVER, NOTIFY, FILTERS, LIST-STATUS, SORT=DISPLAY, SPECIAL-USE / CREATE-SPECIAL-USE, SEARCH=FUZZY, MOVE, UTF8=ACCEPT / UTF8=ONLY, LITERAL-, APPENDLIMIT, STATUS=SIZE, OBJECTID, REPLACE, SAVEDATE, XLIST, and X-GM-EXT1.
* Client-side sorting and threading of messages (the Ordinal Subject and the Jamie Zawinski threading algorithms are supported).
* Asynchronous versions of all methods that hit the network.
* S/MIME, OpenPGP, DKIM and ARC support via MimeKit.
* Microsoft TNEF support via MimeKit.
No packages depend on MailKit.
- Removed APIs marked as [Obsolete] in 2.x.
- Simplify Fetch()/FetchAsync() APIs by using a new IFetchRequest parameter instead. Made previous APIs into extension methods to aid in porting from 2.x.
- Replaced Add/Remove/SetFlags() APIs with Store()/StoreAsync() and simplified the APIs by using a new IStoreFlagsRequest parameter. Made previous APIs into extension methods to aid in porting from 2.x.
- Replaced Add/Remove/SetLabels() APIs with Store()/StoreAsync() and simplified the APIs by using a new IStoreLabelsRequest parameter. Made previous APIs into extension methods to aid in porting from 2.x.
- Simplify Append()/AppendAsync() APIs by using a new IAppendRequest parameter instead. Made previous APIs into extension methods to aid in porting from 2.x.
- Simplify Replace()/ReplaceAsync() APIs by using a new IReplaceRequest parameterinstead. Made previous APIs into extension methods to aid in porting from 2.x.
- Updated SmtpClient.Send()/SendAsync() methods to return a string. (issue #1161)
- Added support for the SCRAM-SHA*-PLUS SASL mechanisms. (issue #950)
- Added authzid support for SCRAM SASL mechanisms.
- Added support for the ANONYMOUS SASL mechanism.
- Added support for an HttpsProxyClient. (issue #1251)
- Added AcceptedKeywords and PermanentKeywords to IMailFolder. (issue #1256)
- Rewrote NTLM support based on official specs. Now supports channel-binding and using the default system credentials.
- Modified ImapFolder.Fetch(int, int, ...) to shortcut if ImapFolder.Count == 0.
- Updated SmtpClient to append an ORCPT arg to RCPT TO commands and to hex-encode the ENVID parameter value.
- Improved/simplified logic for ranking SASL authentication mechisms for each client.
- Added SaslMechanism.ChallengeAsync() to facilitate future SASL mechanisms that may need to make network requests such as Kerberos/GSSAPI and perhaps even future/custom OAuth2 implementations.
- Always set SearchResults.Count/Min/Max properties if we can.
- Throw TimeoutException is case of a network time out. (issue #1269)
- Fixed parsing of IMAP flag lists to handle lowercase flag names. (issue #1277)
- Use OrdinalIgnoreCase when comparing "EARLIER" atom token.
- Avoid unnecessary string copies. (issue #1292)
- Drop support for .NET 4.5 and replace it with .NET 4.5.2
- Simplified event emissions based on EXISTS and EXPUNGED notifications. A CountChanged event is now always emitted when the server sends an EXISTS notification.
| Version | Downloads | Last updated |
|---|---|---|
| 4.14.1 | 1 | 11/06/2025 |
| 4.14.0 | 1 | 11/07/2025 |
| 4.13.0 | 3 | 11/04/2025 |
| 4.12.1 | 1 | 11/07/2025 |
| 4.12.0 | 1 | 11/07/2025 |
| 4.11.0 | 1 | 11/07/2025 |
| 4.10.0 | 1 | 11/07/2025 |
| 4.9.0 | 1 | 11/06/2025 |
| 4.8.0 | 1 | 11/06/2025 |
| 4.7.1.1 | 1 | 11/07/2025 |
| 4.7.1 | 1 | 11/06/2025 |
| 4.7.0 | 1 | 11/06/2025 |
| 4.6.0 | 1 | 11/07/2025 |
| 4.5.0 | 1 | 11/06/2025 |
| 4.4.0 | 1 | 11/06/2025 |
| 4.3.0 | 1 | 11/06/2025 |
| 4.2.0 | 1 | 11/06/2025 |
| 4.1.0 | 2 | 10/28/2025 |
| 4.0.0 | 1 | 11/06/2025 |
| 3.6.0 | 1 | 11/06/2025 |
| 3.5.0 | 1 | 11/06/2025 |
| 3.4.3 | 1 | 11/06/2025 |
| 3.4.2 | 1 | 11/06/2025 |
| 3.4.1 | 1 | 11/06/2025 |
| 3.4.0 | 1 | 11/06/2025 |
| 3.3.0 | 1 | 11/06/2025 |
| 3.2.0 | 1 | 11/06/2025 |
| 3.1.1 | 1 | 11/06/2025 |
| 3.1.0 | 1 | 11/06/2025 |
| 3.0.0 | 1 | 11/06/2025 |
| 2.15.0 | 1 | 11/07/2025 |
| 2.14.0 | 1 | 11/07/2025 |
| 2.13.0 | 1 | 11/07/2025 |
| 2.12.0 | 1 | 11/07/2025 |
| 2.11.1 | 1 | 11/06/2025 |
| 2.11.0 | 1 | 11/07/2025 |
| 2.10.1 | 1 | 11/07/2025 |
| 2.10.0 | 1 | 11/07/2025 |
| 2.9.0 | 1 | 11/06/2025 |
| 2.8.0 | 1 | 11/06/2025 |
| 2.7.0 | 1 | 11/06/2025 |
| 2.6.0 | 1 | 11/06/2025 |
| 2.5.2 | 1 | 11/06/2025 |
| 2.5.1 | 1 | 11/06/2025 |
| 2.5.0 | 1 | 11/06/2025 |
| 2.4.1 | 1 | 11/06/2025 |
| 2.4.0.1 | 1 | 11/07/2025 |
| 2.4.0 | 1 | 11/06/2025 |
| 2.3.2 | 1 | 11/06/2025 |
| 2.3.1.6 | 1 | 11/07/2025 |
| 2.3.1 | 1 | 11/06/2025 |
| 2.3.0 | 1 | 11/06/2025 |
| 2.2.0 | 1 | 11/06/2025 |
| 2.1.5.1 | 1 | 11/07/2025 |
| 2.1.4 | 1 | 11/06/2025 |
| 2.1.3 | 1 | 11/06/2025 |
| 2.1.2 | 1 | 11/06/2025 |
| 2.1.1 | 1 | 11/06/2025 |
| 2.1.0.3 | 1 | 11/04/2025 |
| 2.0.7 | 1 | 11/06/2025 |
| 2.0.6 | 1 | 11/06/2025 |
| 2.0.5 | 1 | 11/06/2025 |
| 2.0.4 | 1 | 11/06/2025 |
| 2.0.3 | 1 | 11/06/2025 |
| 2.0.2 | 1 | 11/06/2025 |
| 2.0.1 | 1 | 11/06/2025 |
| 2.0.0 | 1 | 11/06/2025 |
| 1.22.0 | 1 | 11/07/2025 |
| 1.20.0 | 1 | 11/07/2025 |
| 1.18.1.1 | 1 | 11/07/2025 |
| 1.18.1 | 1 | 11/06/2025 |
| 1.18.0 | 1 | 11/07/2025 |
| 1.16.2 | 0 | 07/01/2017 |
| 1.16.1 | 1 | 11/06/2025 |
| 1.16.0 | 1 | 11/07/2025 |
| 1.14.2 | 1 | 11/07/2025 |
| 1.12.0 | 1 | 11/07/2025 |
| 1.10.2 | 1 | 11/07/2025 |
| 1.10.1 | 1 | 11/06/2025 |
| 1.10.0 | 1 | 11/06/2025 |