MailKit 2.7.0
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 SCRAM-SHA-256, SCRAM-SHA-1, NTLM, DIGEST-MD5, CRAM-MD5, LOGIN, PLAIN, 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, 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.
- Added a MessageSummary.Folder property and MessageThread.Message property to allow developers to thread messages from multiple IMAP folders and be able to figure out which folder each message belongs to.
- Added a work-around for IMAP servers that send a UIDNEXT response with a value of '0'. (issue #1010)
- Added an IMailFolder.Supports(FolderFeature) method so that developers can check whether a feature is supported by the folder without needing a reference to the corresponding ImapClient object in order to check the Capabilities.
- Fixed the HTTP proxy client to accept "200 OK" with an empty body as a successful connection. (issue #1015)
- Fixed the SOCKS5 proxy client to correctly send an authentication request. (issue #1019)
- Added support for customizable ProtocolLogger client/server prefixes. (issue #1024)
- Fixed an NRE in SslHandshakeException.Create() when running on Mono/Linux.
- Modified the SmtpClient to take advantage of the SMTPUTF8 extension for the
MAIL FROMandRCPT TOcommands even if aoptions.Internationalis not explicitly set totrueif any of the mailbox addresses are international addresses. (issue #1026) - Added support for a new Important SpecialFolder (rfc8457).
- Added support for the IMAP REPLACE extension (rfc8508).
- NuGet packages now include the portable pdb's.
API Changes Since 2.0.x:
- Obsoleted SearchQuery.HasCustomFlags() and SearchQuery.DoesNotHaveCustomFlags(). These are now SearchQuery.HasKeywords() and SearchQuery.NotKeywords(), respectively.
- Obsoleted SearchQuery.DoesNotHaveFlags() in favor of SearchQuery.NotFlags().
- Obsoleted the IMessageSummary.UserFlags property in favor of IMessageSummary.Keywords.
- Obsoleted the MessageFlagsChangedEventArgs.UserFlags property in favor of MessageFlagsChangedEventArgs.Keywords.
- All IMailFolder.Fetch and IMailFolder.FetchAsync methods that took a HashSet
userFlags argument now take an IEnumerable keywords argument. Note: this only affects you if your code used named method parameters (e.g. userFlags: myUserFlags).
Note to users upgrading from MailKit 1.x:
In order to authenticate using the XOAUTH2 SASL mechanism, you must now use the following approach:
client.Authenticate (new SaslMechanismOAuth2 (username, auth_token));
.NET Framework 4.5
- MimeKit (>= 2.8.0)
.NET Framework 4.6
- MimeKit (>= 2.8.0)
.NET Framework 4.7
- MimeKit (>= 2.8.0)
.NET Framework 4.8
- MimeKit (>= 2.8.0)
.NET Standard 1.3
- System.Runtime.Serialization.Primitives (>= 4.3.0)
- System.Net.NameResolution (>= 4.3.0)
- System.Net.Security (>= 4.3.2)
- MimeKit (>= 2.8.0)
.NET Standard 1.6
- System.Runtime.Serialization.Primitives (>= 4.3.0)
- System.Net.NameResolution (>= 4.3.0)
- System.Net.Security (>= 4.3.2)
- MimeKit (>= 2.8.0)
.NET Standard 2.0
- System.Runtime.Serialization.Primitives (>= 4.3.0)
- System.Net.NameResolution (>= 4.3.0)
- System.Net.Security (>= 4.3.2)
- MimeKit (>= 2.8.0)
| Version | Downloads | Last updated |
|---|---|---|
| 4.14.1 | 2 | 11/06/2025 |
| 4.14.0 | 2 | 11/07/2025 |
| 4.13.0 | 4 | 11/04/2025 |
| 4.12.1 | 2 | 11/07/2025 |
| 4.12.0 | 2 | 11/07/2025 |
| 4.11.0 | 2 | 11/07/2025 |
| 4.10.0 | 2 | 11/07/2025 |
| 4.9.0 | 2 | 11/06/2025 |
| 4.8.0 | 2 | 11/06/2025 |
| 4.7.1.1 | 2 | 11/07/2025 |
| 4.7.1 | 2 | 11/06/2025 |
| 4.7.0 | 2 | 11/06/2025 |
| 4.6.0 | 2 | 11/07/2025 |
| 4.5.0 | 2 | 11/06/2025 |
| 4.4.0 | 2 | 11/06/2025 |
| 4.3.0 | 2 | 11/06/2025 |
| 4.2.0 | 2 | 11/06/2025 |
| 4.1.0 | 3 | 10/28/2025 |
| 4.0.0 | 2 | 11/06/2025 |
| 3.6.0 | 2 | 11/06/2025 |
| 3.5.0 | 2 | 11/06/2025 |
| 3.4.3 | 2 | 11/06/2025 |
| 3.4.2 | 2 | 11/06/2025 |
| 3.4.1 | 2 | 11/06/2025 |
| 3.4.0 | 2 | 11/06/2025 |
| 3.3.0 | 2 | 11/06/2025 |
| 3.2.0 | 2 | 11/06/2025 |
| 3.1.1 | 2 | 11/06/2025 |
| 3.1.0 | 2 | 11/06/2025 |
| 3.0.0 | 2 | 11/06/2025 |
| 2.15.0 | 2 | 11/07/2025 |
| 2.14.0 | 1 | 11/07/2025 |
| 2.13.0 | 2 | 11/07/2025 |
| 2.12.0 | 2 | 11/07/2025 |
| 2.11.1 | 2 | 11/06/2025 |
| 2.11.0 | 2 | 11/07/2025 |
| 2.10.1 | 2 | 11/07/2025 |
| 2.10.0 | 2 | 11/07/2025 |
| 2.9.0 | 2 | 11/06/2025 |
| 2.8.0 | 2 | 11/06/2025 |
| 2.7.0 | 1 | 11/06/2025 |
| 2.6.0 | 2 | 11/06/2025 |
| 2.5.2 | 2 | 11/06/2025 |
| 2.5.1 | 2 | 11/06/2025 |
| 2.5.0 | 2 | 11/06/2025 |
| 2.4.1 | 2 | 11/06/2025 |
| 2.4.0.1 | 2 | 11/07/2025 |
| 2.4.0 | 2 | 11/06/2025 |
| 2.3.2 | 2 | 11/06/2025 |
| 2.3.1.6 | 2 | 11/07/2025 |
| 2.3.1 | 2 | 11/06/2025 |
| 2.3.0 | 2 | 11/06/2025 |
| 2.2.0 | 2 | 11/06/2025 |
| 2.1.5.1 | 2 | 11/07/2025 |
| 2.1.4 | 2 | 11/06/2025 |
| 2.1.3 | 2 | 11/06/2025 |
| 2.1.2 | 2 | 11/06/2025 |
| 2.1.1 | 2 | 11/06/2025 |
| 2.1.0.3 | 2 | 11/04/2025 |
| 2.0.7 | 2 | 11/06/2025 |
| 2.0.6 | 2 | 11/06/2025 |
| 2.0.5 | 2 | 11/06/2025 |
| 2.0.4 | 2 | 11/06/2025 |
| 2.0.3 | 2 | 11/06/2025 |
| 2.0.2 | 2 | 11/06/2025 |
| 2.0.1 | 2 | 11/06/2025 |
| 2.0.0 | 2 | 11/06/2025 |
| 1.22.0 | 2 | 11/07/2025 |
| 1.20.0 | 2 | 11/07/2025 |
| 1.18.1.1 | 2 | 11/07/2025 |
| 1.18.1 | 2 | 11/06/2025 |
| 1.18.0 | 2 | 11/07/2025 |
| 1.16.2 | 1 | 12/06/2025 |
| 1.16.1 | 2 | 11/06/2025 |
| 1.16.0 | 2 | 11/07/2025 |
| 1.14.2 | 2 | 11/07/2025 |
| 1.12.0 | 2 | 11/07/2025 |
| 1.10.2 | 2 | 11/07/2025 |
| 1.10.1 | 2 | 11/06/2025 |
| 1.10.0 | 2 | 11/06/2025 |