2
votes
1answer
53 views

SMTP routing cases: same @domain as sender and different @domain

I would like to know what is the difference between sending an email to the same @domain as the sender and sending to a different domain. I cant really find a detailed explanation on the web. From ...
0
votes
1answer
109 views

How does domain name resolution work for SMTP relay services?

Having problems with the default e-mail provided by a shared host (blacklisting and quotas), so I'm looking into SMTP services to handle outbound mail instead. However, one thing that I haven't been ...
0
votes
2answers
157 views

SMTP / HELO and RBL black listing

We've been having many issues with our external IP address being put on RBL's and blacklisted. We are using a 3rd party, hosted SMTP e-mail and we have two locations using it. Our TLD is ABC.com. ...
1
vote
1answer
760 views

using gmail as email relay for sendmail

I used to be able to send emails using a gmail account & sendmail configured using one of the guides on the Internet, for example: ...
2
votes
1answer
639 views

Exchange 2010 OWA send connector issue

I have problems sending emails outside organization using OWA (Exchange 2010 installed on SBS 2010, domain is domain.local, local DNS). Web-server and email server are hosted remotely, I am using pop ...
0
votes
2answers
724 views

DNS, SMTP Problem. Trying to send emails through PHP scripts using Gmail server

I have purchased a dedicated server some days ago and I think I don't have enough knowledge to configure its DNS etc. Well, I'll describe my situation. I have a dedicated server for virtualization, ...
1
vote
4answers
213 views

SMTP server requirements

Could someone help answer a few questions regarding the networking / DNS requirements for an SMTP server? Assume the server is setup already. Is a MX record required for SMTP? TCP port 25 open to the ...
0
votes
1answer
259 views

mail server administration

MY postfix does not show that it is listening to the smtp daemon getting mesaage below: The message WAS NOT relayed Reporting-MTA: dns; mail.mak.ac.ug Received-From-MTA: smtp; mail.mak.ac.ug ...
2
votes
4answers
618 views

Why is my email coming from a different domain or IP?

I have the following configured: mail.firstdomain.com - 1.1.1.1 - This domain sends out a lot of email (our newsletter to clients), and thus I keep the two separated. mail.seconddomain.com - 2.2.2.2 ...