EWS Exchange Web Service Extend

Exchange Web Service client for golang, base on mhewedy/ews , if you feel useful,please give me a star, and if you find some bug, please send a issue or pull a request, thanks.

Improvement:

• fixed some bug about NTLM (update github.com/Azure/go-ntlmssp package version Change github.com/Azure/go-ntlmssp to github.com/vadimi/go-http-ntlm/v2,because go-ntlmssp has so many bugs....).
• fixed some service not support HTTP1.1 ,but go will use HTTP2.0 if our service URL is HTTPS (After Go 1.6 ，See THIS).
• Add support for email with Attachment.
• Using strategy like ews-java-api deal with email with attachment.which is save the mail content and subject,than save mail attachment,finally send the mail we saved.(Because ews-java-api project comment said, see below)

        // Bug E14:80316 -- If the message has attachments, save as a
        // draft (and add attachments) before sending.

TODO:

• Inline Attachment - like picture in email body.
• Support html email body with inline attachment.
• Support Mail CC and BCC.

usage:

package main

import (
	"fmt"
	"github.com/johnchenkzy/ews"
	"github.com/johnchenkzy/ews/ewsutil"
	"log"
)

func main() {
	conf := ews.GetDefaultConfig()

	c := ews.NewClient(
		"https://outlook.office365.com/EWS/Exchange.asmx",
		"email@exchangedomain",
		"password",
		&conf,
	)

	email := ewsutil.Email{
			To:          "[email protected]",
			Cc:          "[email protected]",
			Bcc:         "[email protected]",
			Attachments: []string {"./path/to/file1", "./path/to/file2"},
			Subject:     "An email subject",
			Body:        "The email body, as plain text",
			BodyType:    ewsutil.BodyTypeText,
		}
	return ewsutil.SendEmails(client, email)
}

Note: if you are using an on-premises Exchange server (or even if you manage your servers at the cloud), you need to pass the username as AD_DOMAINNAME\username instead, for examle MYCOMANY\mhewedy.

Supported Feature matrix:

Category	Operation	Supported*
eDiscovery operations
Exchange mailbox data operations
	CreateItem operation	✔️ (Email & Calendar & Attachment)
	GetUserPhoto	✔️
CreateAttachment operation	FileAttachment	✔️
	FileInlineAttachment	✔️
Availability operations
	GetUserAvailability	✔️
	GetRoomLists	✔️
Bulk transfer operations
Delegate management operations
Inbox rules operations
Mail app management operations
Mail tips operation
Message tracking operations
Notification operations
Persona operations
	FindPeople	✔️
	GetPersona	✔️
Retention policy operation
Service configuration operation
Sharing operations
Synchronization operations
Time zone operation
Unified Messaging operations
Unified Contact Store operations
User configuration operations

• Not always 100% of fields are mapped.

Extras

Besides the operations supported above, few new operations under the namespace ewsutil has been introduced:

• ewsutil.SendEmail
• ewsutil.CreateEvent
• ewsutil.ListUsersEvents
• ewsutil.FindPeople
• ewsutil.GetUserPhoto
• ewsutil.GetUserPhotoBase64
• ewsutil.GetUserPhotoURL
• ewsutil.GetPersona

NTLM is supported as well as Basic authentication

Reference:

https://docs.microsoft.com/en-us/exchange/client-developer/web-service-reference/ews-operations-in-exchange