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I am having issues with my email lately. A while back (almost a year ago) I setup my domain email to work with Google Apps, and everything has been working perfectly, until recently. Now, when I send an email it arrives with the "From" address of "bt@webhost.dynadot.com". Also, when I try the "Test Account Settings" under my email account in Outlook I receive the test email along with another email specifying a delivery failure as follows:

"Delivery to the following recipient failed permanently:

    bt@briantaylor.me

Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the recipient domain. We recommend contacting the other email provider for further information about the cause of this error. The error that the other server returned was: 553 553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1) (state 14)."

Can you please assist me in resolving this issue?

I just created my email hosting and I sent myself a email and the email did not deliver. What could be the problem?

Since trying as you suggested, everything has been working fine. I admit that I don't understand how that solved the problem, but I appreciate the assistance. Thanks!

I'll try that, but I don't see how that could be.

webhost.dynadot.com is the DNS name for the IP address 208.78.242.185 (which you specified as the IP address to use). Also, I've been using my email without issues for several months setup using the DNS name rather than the IP address. Naturally, I had to use a CNAME record rather than an A record, but it worked exactly the same (up until recently).
I've made the changes and will wait patiently to see if they correct the issue. Thanks for the help.

b_t_alexandria_ca:  Since your first, required record is a CNAME instead of an IP address, mail delivery will fail.  Once you change your records to IP addresses rather than "webhost.dynadot.com" email delivery will continue.  

h_c_amsterdam_nl:

The problem with your account is that you've set up Mailbox users but not actual email addresses.  

The only email address that you have set up is the default admin@domain.com.  To set up email addresses, please follow these steps:

How do I create domain email addresses in my Email plan? To create domain email addresses for your Email package, please follow these steps: Sign in to your Dynadot account. Select "My Emails" from the left-side menu bar. Click on the "Sign In" link. A new page should load in a new browser window. On the Mailboxes section, located in the bottom left corner of the screen, click the Mailbox icon (Manage Mailboxes). Click “Create New Mailbox” on the top right corner. Enter the email address in the provided form. Press the "Create" button to save your changes. Our Pro Email plan supports an unlimited number of email addresses. Learn how to access your email and find out how to turn on a "catch all" email address, so you'll never miss an email just because of a typo! You can also visit the Email FAQ section of our help files for more info about how to set up your email with various platforms such as Gmail, Mac Mail, your iPad and iPhone, and more. From Help Section: Email Plan > Email > How do I create domain email addresse...

I've confirmed that the issue is specifically with receiving emails at my domain from Gmail users. I have set the MX records to point to Google's server as I have the email hosted via Google Apps. Email sent to me ends up in my Google Apps domain email box, unless it is sent from an email address @gmail.com. I receive email from all other addresses it seems (I've tried a @hotmail.com email and receive emails from other domains). I can even successfully send email to @gmail.com email addresses. If an email is sent from an address @gmail.com I never receive the message and the sender receives the error I've mentioned previously.

I'd guess that when an @gmail.com address emails me it is coming from Google's email servers and not being forwarded back to Google's servers by DynaDot. I can see how this may end up being blocked as malicious by firewalls as the sender and forwarding address are probably very similar. I would appreciate if DynaDot would correct the issue.

I just checked another Google troubleshooter tool (http://www.google.com/support/a/bin/answer.py?answer=75869&topic=11543) which verifies the MX records and all looks to be okay from outside of DynaDot. This is definitely an issue which can only be resolved by DynaDot.

I would greatly appreciate prompt resolution in this matter. I rely on this domain and it's emails. I would not like to have to switch everything over to a new host.

Hi,
I'm having the same problem.
Though emails can still be sent, is not receiving any emails at all, returning the sender that same error message.
After googling several sites, it seems to be a problem within the Dynadot account.
Any Dynadot staff that could help us out?
Thanks!

It seems that I can receive email at my domain from hotmail email addresses, but not from other Gmail email addresses. Here's some info from Google:

Occasionally, Gmail IP addresses are included on 'suspicious' lists by third-party organizations, like SORBS. Here are some suggestions that will help your domain receive valid messages and maintain a low level of spam:

   * Try using a spam classifier, like SpamAssassin. When determining if a mail is valid, spam classifiers consider many aspects of the message, rather than just looking at the IP address.
   * If you use a third-party block list, you should have a whitelisting mechanism in your SMTP gateway.
   * Using only one list, such as SORBS, is not recommended.
   * Avoid using lists that only expire entries after long periods of time, or even worse, never. We recommend using a 48-hour list that only keeps records of recent spam activity.

If your domain still has trouble receiving messages from Gmail users, please follow the troubleshooting steps below. At each step, we'll provide instructions or further questions to help narrow down the issue you're facing.