Can receive email but not send
If you are able to receive email but aren't able to send (you may be receiving a message like: "The Server Responded 550 Access Denied – Invalid HELO Name See RFC 2821 18.104.22.168"), check that SMTP authentication is enabled in your mail client.
For Outlook, the setting can be found:
- From the Menu Bar, Click Tools then Click E-mail Accounts
- Select "View or change existing e-mail accounts" then Click "Next"
- Select the Email account and click "Change"
- Click "More settings"
- Select the "Outgoing Server" tab
- Select the box beside "My outgoing server (SMTP) requires authentication"
- Select "Use same settings as my incoming email server"
- Click OK, Next and then Finish.NOTE : In Outlook 2010 and later, the Email account can be selected by going to Menu bar >> File >> Info tab >> Account Settings
For iPhone, iPad, iPod Touch:
Before you begin the steps below it's important to note that there is a known strange behavior with some iPhone / iPad / iPod touch devices - when you change the settings for the Outgoing server, your device may give you an error like "The server could not be verified" or "Cannot Verify Server Identity", and you have to just click "Continue" and sometimes the error will occur 3 or 4 times before it finally goes through. (This is "normal" behavior according to the Apple Support community). So, keep that in mind as you'll likely encounter it at some point during the steps below.
How to get your iPhone, iPad, or iPod Touch to Authenticate SMTP (the Outgoing server) so you can send email:
- From the Home screen click "Settings" and then "Mail, Contacts, Calendars"
- Select the email account you wanted to modify.
- Scroll down to "Outgoing Mail Server" and click "SMTP".
- Click on the "Primary Server" and make sure the slider is "ON"
- Enter the host name in this format:
But replace the "example.com" part with your domain name and then:
- Enter your username (your FULL email address) and the password you assigned to that account
- In the "Authentication" section set it to "Password"
- Set the "Server Port" to 587
Note - as mentioned toward the top of this article, when you change these server settings may encounter a "Cannot Verify Server Identity" message, sometimes several times in a row, and you may have to click "Continue" each time to move forward.
Depending on your device, you may need to click a "Done" button now.
- Go back to the main "Settings" page and then get out of the config all-together.
You should now be able to send email from your device since it is now properly SMTP Authenticating.
- Open Apple's Mail application, go to the Mail menu and choose Preferences. From the Preferences pane, select Accounts. Next, select the account you want to modify by clicking it from the left hand menu.
- The setting for your mail account are listed on the right hand side of this window. You want to select drop down box next to Outgoing Mail Server (SMTP)then select Edit SMTP Server List.
- Select your outgoing mail server, then click the Advanced Tab. Use Default Ports (25, 465, 587) should be checked. Use Secure Sockets Layer (SSL) should be checked.
Authentication should be set to Password.
In the User Name: field type your email address.
In the Password field type the password you chose for this account.
- Click OK to save your settings. You're now finished configuring your outgoing mail server to use authentication.
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