How to color code different mail accounts in Mail
It is easiest to do this on an Apple Computer, as you can set up "Rules" you can apply, even down to color-coding messages from a particular sender.
If you use a Mac: See: Use rules to manage emails you receive in Mail on Mac - Apple Support
Resource: Mail User Guide for Mac - Apple Support
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Re: it is really helpful to quickly lnow which email was received into which account.
For iPhone : There are various options other than color-coding, available:
You can: View emails from one account at a time
Organize email in mailboxes on iPhone - Apple Support
g: says: If you use multiple email accounts with the Mail app, you can use the mailboxes list to view messages from one account at a time.
- Go to the Mail app
on your iPhone. - Tap
in the upper-left corner until you see Mailboxes, then tap a mailbox below the email account you want to access. - Each mailbox listed below a particular email account only displays messages from that email account. For example, to view only messages sent from your iCloud account, tap iCloud, then tap Sent.
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: Filter emails in Mail on iPhone - Apple Support
- Eg: says you can:
- "use filters to temporarily show only certain email messages—the ones that meet all the criteria you select ..."
- "... specify which email accounts are visible in Mail when a particular Focus is on".
- "Match a mail account to a Focus : You can choose which email accounts to receive notifications from when a Focus is on. For example, you can set a filter to show only your work email account and its notifications when your Work Focus is on".
- "If Apple Intelligence* is turned on, you can use Priority Messages to quickly view your most urgent emails". NB: There's more "how to: info. in the above linked article.
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The Mail app "automatically sorts your email messages into categories to help you find and manage messages more quickly:: See: Automatically categorize incoming emails in Mail on iPhone - Apple Support
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Resource : iPhone User Guide - Apple Support for iOS 26
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Mail Support website: (info. / support / contact options etc.
Mail - Official Apple Support