ABCSpell for Outlook Express is a program that instantly adds a spell checking feature into the Outlook Express program. Upon installation, users see a spell check button on the Outlook Express toolbar, and also an option in the menu, by which they can quickly access the spell checking option.

ABCSpell for Outlook Express features various functions like selecting synonyms, antonyms and related words, word lookup, etc. It also has the Online Merriam-Webster Word Lookup function as a built in add-on, working invisibly to support the spell check system.

The operational interface is simple; if users click the spell check icon, it will provide a list of spelling suggestions for misspelled words.

The program makes an automatic quick check when the send message button is selected, so that spellings are checked anyways, even if the users forget to check the message before sending.