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I purchased a domain from Godaddy and i configured our Office 365 on the domain and the office 365 email addresses.

Last week i purchase a hosting from BlueHost and configure the Bluehost DNS records inside GoDaddy, to host our external website. after doing so, i can not send emails to our Office 365 emails, but i can send emails from.. any advice? Thanks

Here is the error i will get when i send email to our office 365 emails:-

Your message couldn't be delivered. It appears that the email address you sent your message to wasn't found at the destination domain, or the recipient's mailbox is unavailable. The email address might be misspelled or it might not exist. Try to fix the problem by doing one or more of the following: • Send the message again. Before you do, delete and retype the complete address. If your email program automatically suggests an address to use don't select it.

• Clear the recipient Auto-Complete List entry in your email program by following the steps in this article. Then resend the message, but before you do, delete and retype the complete address. If your email program suggests an address to use don't select it.

• Contact the recipient by some other means (by phone, for example) to confirm you're using the right address. Ask them if they've set up an email forwarding rule that could be forwarding your message to an incorrect address. If you're still unable to fix the problem, ask the recipient to tell their email admin about the problem, and give them the server that reported the error below. For Email Admins When Office 365 tried to send the message, the external email server returned the error below. This error was reported by an email server outside Office 365, and if the sender is unable to fix the problem by correcting the recipient's email address or clearing the Auto-Complete List entry, then it's likely a problem that only the recipient's email admin can fix. • Check the error for information about where the problem is happening. For example, look for a domain name. The domain name will tell you which organization was responsible for the error. The recipient's email server could be causing the problem, or it could be due to a third-party service that your organization or the recipient's organization is using to process or filter email messages.

• If you can't fix the problem, contact the responsible party's email admin. This could be the recipient's email admin, your smart host service admin, or someone similar. Give them the error and the name of the server that reported the error to help them troubleshoot the issue. Unfortunately, Office 365 support is unlikely to be able to help with these kinds of externally reported errors.

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This question isn't really related to SharePoint and we'd need more information to give you a definitive answer, but to me it sounds like your MX record is no longer pointing at Exchange Online. As a starting point, I'd suggest reviewing this Microsoft article:

https://docs.microsoft.com/en-us/microsoft-365/admin/dns/create-dns-records-at-godaddy?view=o365-worldwide

A very helpful tool to help with DNS troubleshooting is https://mxtoolbox.com

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  • ok i defined this settings inside blueHost:- Type = MX + Name = mydomain.com + Destination = mydomain-com.mail.protection.outlook.com .. but the TTL is disabled and set to 14400 while inside MS docs they mentioned to define the TTL as 3600
    – John John
    Aug 1, 2022 at 13:25

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