Mail delivery failed: return message to sender

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bluviper
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I have created several emails under an addon domain account here @ inmotion hosting.

after 24hours i tried sending email to my other addresses hosted on another mail server. but it cannot be sent. and it always issues the error Mail delivery failed: return to sender

inside it holds the error [email protected] "No user here"

I also tried sending to another email address, this time its hosted by inmotion, and it failed again. having the same error No user here.

how come im having these errors? tho i can send to gmail and yahoo addresses.. but not to these ones...
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JacobIMH
Hello bluviper, and thanks for your question. Sorry to hear that you're having issues with email delivery from your new addon domain. There are several things that can lead to getting a 550 No Such User Here mail delivery error. Unfortunately without knowing the email addresses involved there wouldn't be a good way for us to guess as to which problem you might be encountering. We have a guide on fixing the 550 No Such User email error that goes over some of the possible issues you might be encountering. If none of those options work for you, please be sure to contact technical support and pass along the email accounts you are attempting to send from, and to, so that we can further investigate these problems for you. If you have any further questions please let us know. - Jacob