iCloud does not send emails on its own — you send emails through iCloud Mail
iCloud is a storage and sync service, not an email system. But Apple includes iCloud Mail as part of your iCloud account, and that is where your email lives. When you send an email from an iCloud address (one ending in @icloud.com, @me.com, or @mac.com), you are using iCloud Mail to send it. iCloud stores that email and syncs it across your devices — your iPhone, iPad, Mac, and the iCloud website. The confusion comes from mixing up the storage part with the email part. iCloud the service does not automatically send anything. iCloud Mail, the email process built into it, does.
If you have an iCloud account, you already have an iCloud Mail address. You do not need to set up email separately or pay extra. The email comes with the account. When you open Mail on your iPhone or Mac, or visit iCloud.com in a browser, you are accessing the same mailbox from any device. Apple keeps all your messages, drafts, and sent items in sync across everything you own.
Key Takeaways
- iCloud Mail is included free with every iCloud account and uses an address ending in @icloud.com, @me.com, or @mac.com.
- You send emails through iCloud Mail by composing a message in the Mail app on your device or at iCloud.com — iCloud does not send emails automatically unless you set up rules or forwarding.
- iCloud syncs your email across all your Apple devices, so a message you read on your iPhone appears as read on your Mac when ready.
- You can add other email accounts (Gmail, Outlook, Yahoo) to the Mail app and send from them too, but those accounts are separate from iCloud Mail.
- iCloud Mail stores your messages in iCloud storage, which means large attachments count toward your 5 GB free limit or your paid plan.
How iCloud Mail sends and stores your messages
When you compose and send an email from an iCloud Mail address, Apple's servers handle the sending. The message goes out through iCloud's mail servers, and a copy stays in your Sent folder. That copy is stored in iCloud and synced to all your devices. If you delete the email on your iPhone, it disappears from your Mac and the iCloud website too — because they are all looking at the same mailbox.
This is different from downloading email to one device. With iCloud Mail, the messages live on Apple's servers, and your devices show you a live view of what is there. If your phone runs out of storage space, your emails do not disappear — they stay on iCloud's servers and you can still read them. This also means if you lose your phone, your emails are not lost with it.
Attachments you send count toward your iCloud storage. If you send a 100 MB video to someone, that 100 MB counts against your 5 GB free storage limit (or your paid plan if you have one). Attachments you receive also count. This is why people with many emails and large files sometimes run out of iCloud storage.
What iCloud Mail can and cannot do automatically
iCloud Mail does not send emails on its own unless you tell it to. You can set up rules in Mail settings that automatically forward, delete, or sort incoming messages, but those are reactions to emails you receive — not automatic sending. You can also set up email forwarding so that messages sent to your iCloud address go to another account, but again, that is not iCloud sending anything new.
iCloud also does not send notifications or alerts automatically. If someone sends you an email, iCloud does not email you about it — your iPhone or Mac sends you a notification on the device itself. If you want to be notified by email when something happens (like a password reset), that comes from the service that is resetting your password, not from iCloud.
One thing iCloud Mail does do automatically is sync. The moment you send an email from your iPhone, it appears in your Sent folder on your Mac. The moment you read an email on your iPad, it marks as read on your iPhone. This happens in the background without you doing anything.
iCloud Mail versus other email accounts in the Mail app
The Mail app on your iPhone or Mac can hold multiple email accounts. You might have iCloud Mail, Gmail, and Outlook all in the same app. Each account is separate. When you send from your Gmail address, Gmail's servers send it — not iCloud. When you send from iCloud Mail, iCloud's servers send it. The Mail app is just the interface that lets you access all of them in one place.
This matters because each account has its own storage. Your Gmail account uses Google's storage, not iCloud storage. Your Outlook account uses Microsoft's storage. Only messages in your iCloud Mail account count toward your iCloud storage limit. If you are running out of iCloud storage, deleting emails from your Gmail account in the Mail app does not help — you need to delete iCloud Mail messages.
You can set which account is your default, so when you compose a new email, it comes from that account by default. But you can change it for any single email. If your default is iCloud Mail but you want to send from Gmail, you can pick Gmail when you hit Send.
Why iCloud Mail might not be sending or receiving
If emails are not going out from your iCloud Mail address, the most common reason is that Mail is not set up correctly on that device. On an iPhone or iPad, go to Settings > Mail > Accounts and make sure your iCloud account is listed and turned on. On a Mac, open Mail > Settings > Accounts and check that iCloud is there and enabled. If it is missing, you need to add it.
Another reason is that you are sending from the wrong account. If you have multiple accounts in Mail, check which one is selected before you send. The account name appears at the top of the compose window. If it says Gmail but you meant to send from iCloud, change it before hitting Send.
If you are not receiving emails, check that iCloud Mail is not turned off in your device settings. On iPhone, go to Settings > [Your Name] > iCloud and make sure Mail is toggled on. If it is off, iCloud Mail will not sync to that device. Also check that you are not accidentally filtering emails into a folder — sometimes emails arrive but end up in a folder you do not check often.
iCloud Mail storage and what happens when you run out of space
Every iCloud account gets 5 GB of free storage. That 5 GB covers everything: your iCloud Mail messages, iCloud Drive files, iCloud Photos backups, and device backups. If you send or receive emails with large attachments, they eat into that limit quickly. A 50 MB PDF attachment in an email counts as 50 MB toward your 5 GB.
When you run out of iCloud storage, you cannot send emails with attachments, and you cannot receive emails with attachments. You can still send and receive text emails. To fix it, you can delete old emails (especially ones with attachments), delete files from iCloud Drive, or delete old device backups. You can also pay for more storage — Apple offers plans starting at 50 GB per month.
If you delete an email from iCloud Mail, it goes to the Trash folder and stays there for 30 days before Apple permanently deletes it. During those 30 days, it still counts toward your storage limit. If you need space urgently, empty your Trash folder to free it up when ready.
How to set up iCloud Mail on a new device
If you get a new iPhone, iPad, or Mac, iCloud Mail is usually already set up if you sign in with your Apple ID. When you open Mail, your iCloud account should appear automatically. If it does not, you can add it manually. On iPhone, go to Settings > Mail > Accounts > Add Account, choose iCloud, and sign in with your Apple ID. On Mac, open Mail > Settings > Accounts, click the plus button, choose iCloud, and sign in.
Once iCloud Mail is set up on a device, it syncs your messages from the past 30 days by default. If you want to see older emails, go to Mail settings and change the sync period. You can choose to sync the past month, three months, six months, or all mail. Syncing more mail takes more device storage, so older devices might want to sync less.
If you have an older email address that ends in @me.com or @mac.com, that is also iCloud Mail — it works the same way and syncs the same way. You can use any of your iCloud email addresses to send from, and they all go to the same mailbox.
Frequently Asked Questions
Can I use iCloud Mail on a non-Apple device like Android or Windows?
Yes, you can access iCloud Mail on any device by going to iCloud.com in a web browser and signing in with your Apple ID. You can read, send, and delete emails from there. However, you cannot add iCloud Mail to the Gmail app or Outlook app on Android or Windows — those apps do not support iCloud accounts. The web version is your only option on non-Apple devices.
Does iCloud Mail automatically back up my emails?
iCloud Mail stores your emails on Apple's servers, so they are backed up automatically. If you delete an email by mistake, you have 30 days to recover it from the Trash folder. After 30 days, it is permanently deleted. This is not the same as a device backup — your emails are safe even if your phone is lost or broken.
What happens to my iCloud Mail if I stop paying for iCloud storage?
If you exceed your free 5 GB and do not pay for more storage, you cannot send emails with attachments or receive emails with attachments. You can still send and receive text emails. Your existing emails stay in your account. Once you free up space or buy a storage plan, everything works again.
Can I send an email from iCloud Mail to make it look like it came from a different address?
No. When you send from an iCloud Mail address, the recipient sees it came from that iCloud address. You cannot spoof or mask the sender address. If you want to send from a different email account, you need to add that account to Mail and send from it directly.
Does iCloud Mail work if I do not have an Apple device?
Yes. You can access iCloud Mail from any computer or phone by visiting iCloud.com in a web browser. You do not need an iPhone, iPad, or Mac to use iCloud Mail — you just need an Apple ID. However, the sync features (where changes on one device appear when ready on another) only work across Apple devices.