While trying to figure out if email is not being sent in Outlook 2010, following these steps is very helpful to resolve the problem.
Email server is offline
Sometimes Outlook can’t send your messages because your email server is offline–whether an email server at work or online. If that’s the case, keep working! As soon as it comes online, Outlook will send all the messages in your Outbox in a second or two.
You’ll know your server is offline if you see “Disconnected” in the Status bar.
When you’re up and running, it will say “Connected.”
Many clients are caught with email that will not send. Often it is related to the size of the email attachment. While Adobe offers ways to reduce the size of the PDF, photos and jpeg’s are often confusing to resize. Outlook 2010 fixes this, through the following steps:
Picture files attached within Outlook
When you add attachments in Outlook, you can reduce picture attachments on a per-message basis. When you choose to resize large images, any attached image is reduced to a maximum resolution of 1024×768 pixels
Note If you embed the picture in the message body — the picture appears in the message — by using the Picture command in the Illustrations group, the image attachment resize feature is not available.
- Create a new e-mail message in Outlook.
- On the Insert tab, in the Include group, click Attach File.
Tip You can also drag and drop a picture from Windows Explorer. The picture file will be attached to the e-mail message.
- In the message window, click the File tab.
- Under Image Attachments, click Resize large images when I send this message.
- Click the Message tab to return to your message.
- When you are finished composing your e-mail message, click Send.
Read more here.