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Cannot send message using the server iCloud

Verify that you have addressed this message correctly. Check your SMTP server settings in Mail preferences and verify any advanced settings with your system administrator.


The server response was: <unknown[84.203.86.196]>: Client host rejected: Access denied


Select a different outgoing mail server from the list below or click Try Later to leave the message in your Outbox until it can be sent.


Sending from: xxx@icloud.com


Can anyone please help me?


FYI - I am using macOS Big Sur 11.4

MacBook Pro 13″, macOS 11.4

Posted on Jul 16, 2021 3:16 PM

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Question marked as Top-ranking reply

Posted on Jul 17, 2021 1:43 AM


If your iCloud account is not connected ( just an example ) , open mail application click on I cloud and send a mail from - iCloud address ( in the To - field type your gmail address ) the mail will be sent to your inbox in your apple mail application a pop up appears , in this screen shot it is showing could not connect to outgoing server , thats the reason when connection doctor is opened SMTP for iCloud is totally vanished .You can apply same with gmail say if IMAP or SMTP is not working . Simply click on always use this server to get joined .

And you will observe all IMAP / SMTP for gmail account and iCloud account are showing green dots and joined to their respective server .


Compose a mail ( use command and N keys ) , fill up the credentials select a different mail address and click on try with selected server , in fact in mail preferences send new messages is automatic , that's the reason see the article https://support.apple.com/en-ie/guide/mail/cpmlprefcomp/13.0/mac/10.15

Send new messages from .

The email address to use when you send messages.

If you use several email accounts, you can have Mail automatically select the best address, based on the email address of the first recipient in your message, as well as the currently selected mailbox and message.

You can click on drop down arrow and choose the desired mail address like example1@icloud.com

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1 reply
Question marked as Top-ranking reply

Jul 17, 2021 1:43 AM in response to johnchristraj


If your iCloud account is not connected ( just an example ) , open mail application click on I cloud and send a mail from - iCloud address ( in the To - field type your gmail address ) the mail will be sent to your inbox in your apple mail application a pop up appears , in this screen shot it is showing could not connect to outgoing server , thats the reason when connection doctor is opened SMTP for iCloud is totally vanished .You can apply same with gmail say if IMAP or SMTP is not working . Simply click on always use this server to get joined .

And you will observe all IMAP / SMTP for gmail account and iCloud account are showing green dots and joined to their respective server .


Compose a mail ( use command and N keys ) , fill up the credentials select a different mail address and click on try with selected server , in fact in mail preferences send new messages is automatic , that's the reason see the article https://support.apple.com/en-ie/guide/mail/cpmlprefcomp/13.0/mac/10.15

Send new messages from .

The email address to use when you send messages.

If you use several email accounts, you can have Mail automatically select the best address, based on the email address of the first recipient in your message, as well as the currently selected mailbox and message.

You can click on drop down arrow and choose the desired mail address like example1@icloud.com

Cannot send message using the server iCloud

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