Powershell Script To Send Email

Powershell Script To Send Email – In the next two series of articles we will discuss the topic – How to use the Send Email PowerShell Script which uses the Office 365 Mail Server as its mail server. The most common uses of Send PowerShell Email Script are:

Before we get started, let’s take a quick look at how to create a Send Email PowerShell Script where clients can access Office 365 email services.

Powershell Script To Send Email

Powershell Script To Send Email

When we want to access the Office 365 mail server (Exchange Online), we can use one of the following methods:

Powershell Module To Send Email Without Need For Smtp Relay Server

Our PowerShell script uses an SMTP session (unencrypted session) to access the Office 365 mail server method.

Powershell Script To Send Email

“Anonymous connection” means that the party contacting the Office 365 mail server (PowerShell script) does not provide any user information.

The main advantage of this approach is that we avoid the process of providing user data. Requiring credentials is “blind” to other tasks, such as requiring credentials etc.

Powershell Script To Send Email

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The main disadvantage of using an anonymous connection is that the mail server cannot trust the sender because the sender appears to be anonymous.

Usually, emails sent by PowerShell scripts are detected as fraudulent emails because – the receiving Office 365 email address we use as “From Address” is not verified.

Powershell Script To Send Email

Another downside is that when using “anonymous sessions” we cannot send emails to “external recipients”, i.e. recipients whose email addresses are not hosted on the Exchange Online server hosting our domain.

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A solution to this issue can be achieved by creating an Exchange Online incoming mail connector or by specifying ten sender email addresses in the allowed senders whitelist.

Powershell Script To Send Email

Note – If you need more information on how to create such a mail connector, please read the article – Sending Mail to Exchange Online Using a Standard SMTP Session | Part 2#4

The PowerShell script accesses the Office 365 mail server using a TLS session (encrypted session) + providing user information (authenticated session).

Powershell Script To Send Email

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Security of the communication channel – When using the TLS protocol, the communication channel between the host sending the email and the Office 365 mail server is encrypted.

Authenticated Session – The main advantage of this method is that when we provide the recipient’s Office 365 information, Exchange Online will be associated with the “sender” as a trusted sender.

Powershell Script To Send Email

Because of this, we don’t need to add additional configuration settings on the Exchange Online server side, and we can also send emails to external recipients that are not on the Exchange Online server.

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If we want to use the Send Email PowerShell Script as a scheduled task, we need to find a solution that gives the PowerShell script access to the necessary data stored in the file.

Powershell Script To Send Email

While we can add passwords to unprotected text files (PowerShell files), this option is not recommended.

The solution to this “security need” is achieved by a method where we create an encrypted password file and instruct the “send email PowerShell script” to access the encrypted file and retrieve the required password from it.

Powershell Script To Send Email

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The process by which we have to encrypt credentials is considered more complex than if we were using an SMTP session without credentials.

In this section, we will see how to create a Send Email PowerShell Script that uses Office 365 as an email server.

Powershell Script To Send Email

In this case we create a standard SMTP session where we don’t provide any user information (anonymous connection).

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Before running the Send PowerShell Mail Script, we need to ensure the following requirements are met:

Powershell Script To Send Email

If we have not previously used an existing PowerShell console to run PowerShell scripts, we need to configure the PowerShell console to “allow” the execution of PowerShell scripts.

If you need a tutorial on how to enable PowerShell script execution, you can use the tutorials in the following sections

Powershell Script To Send Email

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We need to check that our firewall contains a rule that allows our desktop to establish an SMTP session (port 25) with the Office 365 mail server.

If you run the Send Email PowerShell Script from a desktop that uses a Dynamic IP Address (such as a home network), the Office 365 mail server (Exchange Online) will not accept the communication request.

Powershell Script To Send Email

You must use a host that is on a network that uses static IP addresses to represent internal hosts.

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In an Office 365 environment, if we want to use an unauthenticated session with the Office 365 mail server, we need to find the Exchange Online principal name that represents our public directory domain in Office 365.

Powershell Script To Send Email

Note – We’ll cover how to get the Exchange Online hostname information in the next chapter.

Task 1#3 – Obtain information about the principal name of the MX record representing your public domain name in Office 365

Powershell Script To Send Email

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We will use the Office 365 Admin Portal to access the hostname of the Office 365 mail server representing our public domain name.

In our scenario, we will choose to view domain name settings – by clicking on the selected domain name.

Powershell Script To Send Email

In our scenario, we saved the “Send Email PowerShell Script” in the scripts folder we created on the C drive:

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To manage PowerShell scripts, we need to set the default PowerShell policy.

Powershell Script To Send Email

To update an existing Exaction PowerShell policy, we need to run the PowerShell console as an administrator.

For example to invoke a PowerShell script we need to write the following characters -., write the first letter (“s”) of the PowerShell script and press the Tab key.

Powershell Script To Send Email

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After “pressing” the TAB key, the PowerShell console, we complete the rest of the PowerShell script name ourselves.

To verify that the email was sent successfully, we use the OWA mail client to log into the administrator mailbox.

Powershell Script To Send Email

In the screenshot below, we can see that the email has been successfully sent to the intended recipient, but it should be noted that the email sent to

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This is expected because, as mentioned earlier, the PowerShell script uses the identity of the Office 365 administrator (admin@). Since the PowerShell script does not provide any user information, Exchange Online considers the email as “suspicious email” and therefore marks the email as spam!

Powershell Script To Send Email

If this is to be avoided, it is recommended to create an Exchange Online connector that identifies the “source sender” by its IP address.

You can read more about this configuration in the article – Sending Mail to Exchange Online Using a Standard SMTP Session Part 2#4 Windows PowerShell is basically known as a command line shell and is used to handle some administrative tasks in Windows and Programs that run on this operating system. At the same time, it is a scripting language that allows you to customize cmdlets—lightweight commands that perform specific tasks. And today, we’re going to talk about it

Powershell Script To Send Email

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All you need to do is enter the sender and recipient email addresses and specify the SMTP server you are using. Then copy this script into your PowerShell and hit enter.

To check that the code is working, you can send a test email to the virtual mailbox. For this, you need a suitable email testing solution, such as Email Sandbox, which belongs to the email delivery platform.

Powershell Script To Send Email

Email Sandbox gives you one virtual mailbox (or up to 300 virtual mailboxes with the highest plan) to which you can send test emails, then check and edit them. In this way, the solution provides you with a safe environment to find any issues related to your emails without the risk of spamming the real recipients or damaging your domain’s reputation because you There is no longer any need to access your personal mailbox for testing purposes.

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Sandbox Email’s features include HTML/CSS analysis, checking and previewing email content spam score, insight into valuable technical information, domain blacklist reports, and more. This means whether you are using plain text or HTML emails, whether they contain images/attachments etc, this testing solution will work great.

Powershell Script To Send Email

Here, we just specified the SMTP host. As you might have guessed, the To and From addresses are not real. That’s one of the benefits of using an email testing solution – you don’t need to use real email to test your email workflow.

When you copy and paste this script into PowerShell and press Enter, a window will appear asking you to get your SMTP credentials (username and password) from your virtual mailbox. You can find these credentials in your account under Mailbox -> Mailbox -> SMTP Settings.

Powershell Script To Send Email

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Use the popup to enter your credentials and continue. In no time, a test email should appear in your virtual inbox.

Alternatively, you can use email, but this can be a slow testing experience. Find out why in our blog post Why Testing With Dummy Emails Doesn’t Work.

Powershell Script To Send Email

Yes

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