If you are experiencing broken images (URL’s) and links in notification emails coming from SharePoint, it may be due to a discrepency between how image and link assets are referenced in the blog posts (using only a /relative URL instead of a http://FQDN/ -based URL).
images and links will be broken because their URL’s are missing the servername.
Image is trying to go to: http://blogs/Lists/Posts/Attachments/777/myimage.png
instead of https://go.mysharepoint.com/blogs/Lists/Posts/Attachments/777/myimage.png
..and so displays as a nasty red X (or nothing at all) in your users email client.
So, Nintex to the rescue:
In the workflow that emails our staff notifications of the new blog post (including the blog post content), we do some string replacements on the body of the email:
1. Create a new Muliline Text variable called vOutputText
2. Create a new Regular Expression Action in your Nintex workflow:
Pattern (ignore case): src=”/blogs/Lists/
Operation: Replace Text
Replacement Text: src=”http://go.mysharepoint.com/blogs/Lists/
Store Result In: vOutputText
3. Rinse and repeat step two for each variation of links you encounter in your posts. You may find that authors consistently use other SharePoint Document Library, List and Site link patterns in their posts. You should add a new regex for each one of those.
4. Set the vOutputText to be the content of your notification email action.
5. Fire up the workflow and the email containing your blog post content should display the rebased URLs you addressed as expected.
That being said – as mentioned this is a basic & brittle approach – chances are other link patterns will sneak in there and you’ll still get broken links when people reference new parts of your SharePont site that you didn’t account for. If you care to go deeper into Regular Expressions, the Nintex Regular Expression action is fully capable of supporting more advanced expressions that would be able to rebase URL’s that are missing their root domain name and not get tripped up on differences in subfolder paths. Since this is a Nintex Action lesson and not a Regular Expression lesson, I will refer you MSDN for learning more about Regular Expressions and to the great program RegexBuddy for developing and testing your fabulous new bullet-proof Regex’s.