$ ohpm install @ohos/emailjs

    import { XXXXXXXX } from '@ohos/emailjs'

  // options is an object with the following recognized schema:
const options = {
	user, // username for logging into smtp
	password, // password for logging into smtp
	host, // smtp host (defaults to 'localhost')
	port, // smtp port (defaults to 25 for unencrypted, 465 for `ssl`, and 587 for `tls`)
	ssl, // boolean or object (if true or object, ssl connection will be made)
	tls, // boolean or object (if true or object, starttls will be initiated)
	timeout, // max number of milliseconds to wait for smtp responses (defaults to 5000)
	domain, // domain to greet smtp with (defaults to os.hostname)
	authentication, // array of preferred authentication methods ('PLAIN', 'LOGIN', 'CRAM-MD5', 'XOAUTH2')
	logger, // override the built-in logger (useful for e.g. Azure Function Apps, where console.log doesn't work)
};

const headers = {
	from, // sender of the format (address or name <address> or "name" <address>)
	to, // recipients (same format as above), multiple recipients are separated by a comma
	cc, // carbon copied recipients (same format as above)
	bcc, // blind carbon copied recipients (same format as above)
	text, // text of the email
	subject, // string subject of the email
	attachment, // one attachment or array of attachments
};

const options = {
	// one of these fields is required
	path, // string to where the file is located
	data, // string of the data you want to attach
	stream, // binary stream that will provide attachment data (make sure it is in the paused state)
	// better performance for binary streams is achieved if buffer.length % (76*6) == 0
	// current max size of buffer must be no larger than Message.BUFFERSIZE

	// optionally these fields are also accepted
	type, // string of the file mime type
	name, // name to give the file as perceived by the recipient
	charset, // charset to encode attatchment in
	method, // method to send attachment as (used by calendar invites)
	alternative, // if true, will be attached inline as an alternative (also defaults type='text/html')
	inline, // if true, will be attached inline
	encoded, // set this to true if the data is already base64 encoded, (avoid this if possible)
	headers, // object containing header=>value pairs for inclusion in this attachment's header
	related, // an array of attachments that you want to be related to the parent attachment
};

const options = {
	user, // username for logging into smtp
	password, // password for logging into smtp
	host, // smtp host (defaults to 'localhost')
	port, // smtp port (defaults to 25 for unencrypted, 465 for `ssl`, and 587 for `tls`)
	ssl, // boolean or object (if true or object, ssl connection will be made)
	tls, // boolean or object (if true or object, starttls will be initiated)
	timeout, // max number of milliseconds to wait for smtp responses (defaults to 5000)
	domain, // domain to greet smtp with (defaults to os.hostname)
	authentication, // array of preferred authentication methods ('PLAIN', 'LOGIN', 'CRAM-MD5', 'XOAUTH2')
	logger, // override the built-in logger (useful for e.g. Azure Function Apps, where console.log doesn't work)
};

|-entry 
    |-ets
    |   |-entryability
    |           |-EntryAbility.ts
    |   |-pages
    |           |-LoginPage.ets             #主页demo
    |           |-SendMailPage.ets
|-SMTP
    |-ets  #
    |-js   #