If you or your Organization or Project Administrator set your timezone to something other than the default for your project location, you’ll see a different date displaying on a mail in Mail view than on the same mail in the Tasks page and Search results.
Each Aconex project is housed on a certain instance, which typically relates to the project location. To provide a single source of truth for your project, all mail dates are recorded in UTC (Coordinated Universal Time) on that instance.
If you select a timezone other than the default, dates on individual mails will reflect the local time in the selected timezone in the Mail view. However, the search results will still show dates in UTC on your instance, so you’ll know what the “universal” send date of the mail was for all project participants.