You can look up email in different ways.

By sorting your emails

1. Make sure you use the view option mode Reading Pane at the bottom/off by clicking View in the toolbar.

2. Sort emails by Flagged emails, its priority, tags, sender, attachment, subject, email size or when it was sent by clicking the relevant title.

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By searching for your e-mail

Quick Search

Fill out a proper criteria in the search box and search for it by clicking Search. Such as a word, name, date, time or size.

Advanced Search

The advanced search feature opens up an extra field to use when you click Advanced Search. You can use several search criterias at once.

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Further reading

How to search for objects
Different search criterias
Advanced searches