Support » Plugin: Postman SMTP Mailer/Email Log » DNS Error: Domain name not found

  • I have a WordPress site that is available only on my corporate intranet, not visible on the internet. Test messages from Postman SMTP are delivered fine. But notifications sent when posts or forum comments are generated are not making it to any destination. I can see the deliveries in the Postman SMTP Email log. But I get the following bounce messages:

    Delivery to the following recipient failed permanently:
    noreply@campfire.nmcounties.org

    Technical details of permanent failure:
    DNS Error: Address resolution of campfire.nmcounties.org. failed: Domain name not found

    It is true that from the point of view of the smtp.gmail.com servers on the internet, that campfire.nmcounties.org does not exist.

    Am I required to expose the WordPress server to the internet for Postman SMTP to work?

    https://wordpress.org/plugins/postman-smtp/

Viewing 2 replies - 1 through 2 (of 2 total)
  • I am still struggling with this error, and am now working with Google tech support.

    They said to check with WP tech support, and that’s what this here post is.

    In case it helps anybody who follows my trail, here is my conversation with Google tech support:

    Mary P
    1:24 PM
    I understand you are having issues with a 3rd party plugin from WordPress. From what I understand this mail doesn’t route through Google.
    ________________________________________
    me
    1:25 PM
    Yes.
    ________________________________________
    Mary P
    1:25 PM
    Have you tried contacting WordPress about this issue?
    ________________________________________
    me
    1:26 PM
    No, and given that it is a free plugin I don’t know if I can get support.
    ________________________________________
    Mary P
    1:26 PM
    Okay but the plugin doesn’t interact with Google Apps email in any way in regards to delivery.
    ________________________________________
    me
    1:27 PM
    I think it does though. Under the covers I think it uses googleapis.com.
    ________________________________________
    Mary P
    1:28 PM
    Okay but it is 3rd party and it isn’t something that is really covered by our support.
    Allow me 2 to 5 minutes to see if there is anything I can find that may help you.
    ________________________________________
    me
    1:29 PM
    Thanks. Basically I need to know if a gmail client has to actually exist on the internet. It seems like Gmail is doing a DNS lookup of the sending host (campfire.nmcounties.org) which is not defined on the internet.
    ________________________________________
    Mary P
    1:34 PM
    Looks like you would need to have it on the internet, since it requires a connection the mail server. And I’m not sure if this their own mail server, or your Google Apps.
    So it is definitely doing a lookup of DNS.
    ________________________________________
    me
    1:36 PM
    Are you saying that the Google API requires a connection to our server?
    ________________________________________
    Mary P
    1:36 PM
    It isn’t the API.
    The API is only for connection to the account, OAuth.
    The App itself needs to be able to connect to mail servers.
    ________________________________________
    me
    1:37 PM
    It can see your servers, I have checked that. And I did the OAuth thing, with a client ID and client secret.
    ________________________________________
    Mary P
    1:38 PM
    Okay, unfortunately this isn’t part of our service. So there isn’t much we can do.
    You would need to contact the App developer or support team.
    ________________________________________
    me
    1:39 PM
    OK, then. I will keep trying. Thanks Mary P.

    -David Borton

Viewing 2 replies - 1 through 2 (of 2 total)
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