Email Message Files
How to Work With Email Message Files via Aspose.Email Cloud API
Aspose.Email Cloud API supports email message files with EML, MSG, MHTML and HTML format. We have API for creating, editing, converting such files. Also, email message files can be used in the built-in email client.
Our SDKs support two different ways of operating with email message files using MapiMessageDto and EmailDto. This tutorial shows how to use an EmailDto.
Email Message Files
Simply put, email message files are the files using to exchanging messages between people using electronic devices. Sounds simple, isn’t it?
You may already know this. In our time, it’s hard to find a person who doesn’t use email message. We use emails everywhere at our work, in a friendly conversation, etc.
There are many ways to send and retrieve emails, so, there are many file formats for these purposes.
Let’s find out which email formats exist:
- EML — using in Microsoft Outlook Express as well as some other email programs. An email message saved to a file in the MIME RFC 822 standard format. EML files usually contain plain ASCII text for the main message body, headers and hyperlinks and attachments.
- MSG — using in Microsoft Outlook and Exchange. An MSG file can contain plain ASCII text as in EML files.
- HTML — the extension for web pages created for display in browsers. The HTML file format is very convenient to display emails on the web sites.
As we have mentioned before, email message files are using for exchanging messages. With Aspose.Email Cloud API you can easily change the email’s data, attachments and other information. The API can help you to simplify the development of your product and achieve your goals. The Cloud approach provides you with the processing power of our servers, using them you do not need to process messages on your servers, provide this to us. User-friendly API provides security and ease of development.
How to Create Email Object and Save It as File on Storage
The best way to work with emails is to use EmailDto objects. EmailDto object contains all email’s data:
Email’s data that is contained in EmailDto
- Collection of alternate views of the message.
- Email message attachments.
- BCC recipients.
- Message subject.
- Sender address.
- The address collection that contains the recipients of a message.
- Email message body as plain text.
- Body encoding.
- The content type of message body: PlainText, Html, Rtf.
- CC recipients.
- Message date.
- Delivery notification options.
- From address.
- Document headers.
- HTML body.
- Linked resources of a message.
- The list of addresses to reply to for the mail message.
- And other email’s data.
Create Email File — EmailDto Object
First, let’s create an EmailDto object and save it as a file on the Storage.
To create an email file (EML, MSG, MHTML, HTML) you need to create EmailDto object. To initialize EmailDto object let’s define main fields: From (accepts MailAddress object which contains the email address of a sender), To (accepts List of MailAddress objects; parameter To can contain several email addresses), Subject (accepts a string with a subject of an email), Body (accepts a string with a body’s content).
After creating EmailDto object we save it to Storage. To save it we need to choose storage and folder where we want to save our created email file. Also, we need to create a name for this email file. EmailApi class has a function called SaveAsync which requires one parameter — EmailSaveRequest.
EmailSaveRequest has 3 fields:
- Format defines a file format.
- Value is an EmailDto object.
- StorageFile is an StorageFileLocation object that defines the email file location on Storage.
Look at the following code examples:
How to create an EmailDto object and save it as a file on storage?
You can edit the EmailDto object and save it again. If file name and location will be the same, the file will be overwritten.
How to Download Email File From Storage
You can download files from the Storage.
FileApi class has DownloadFileAsync function which allows to download files from Storage asynchronous as a Stream. This function has one required parameter — DownloadFileRequest. To define it you need to pass 2 parameters into it: a file’s path as a string and a name of Storage you want to download from.
To download the file that we created in the previous step from the Storage, use the following steps:
How to download a file from the Storage?
Also, you can download a file in another format.
Aspose.Email Cloud allows you to download email messages from Storage in many different file formats. For example, you have an EML file, you want to download it but in MSG. You can download it immediately without separate converting.
To initialize EmailGetAsFileRequest you need to pass 4 parameters into it: a name of an email file on Storage as a string, a result file’s extension as an Enum (EML, MSG, MsgUnicode, MHTML, HTML), storage’s name as a string and a path to a folder on Storage where email file is.
If you do everything right you will get the email file as a Stream.
How to download a file from the Storage in a different format?
You can download the file as an EmailDto object:
EmailDto provides you with an easier way to work with emails. It allows to change and get data from an email file in several code lines.
EmailGetRequest accepts 2 required parameters: an email document format as Enum (EML, MSG, MsgUnicode, MHTML, HTML), email document file name as a string; and 2 optional parameters: storage’s name as a string and a path to a folder on Storage where email file is as a string too.
How to download a file as EmailDto object?
How to Append Email Object to “INBOX” Folder of IMAP Account
We can append this EmailDto object to the “INBOX” folder of an IMAP account:
ClientMessageAppendRequest object has 4 parameters:
- Account location on storage represented as a StorageFileLocation object.
- Email account folder to store a message as a string. For example, “INBOX”.
- Mark message as sent. Nullable bool parameter.
- Email document. In our case it should be represented as a MailMessageDto object.
As a result, you will add an email from model to a specified folder in an email account.
How to append EmailDto object to the “INBOX” folder of an IMAP account?
How to Convert Email From One Format to Another
If you don’t want to use all these models and storages, and just want to convert email file from one format to another, use the fast and convenient Converter developed by Aspose.
It has 3 required parameters:
- Email file format to convert from. Possible values are: EML, MSG, MsgUnicode, MHTML, HTML.
- Email file format to convert to.
- File to convert as a Stream.
How to convert an email from one format to another?
See more Aspose Email tutorials: