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Hello! I have Linux RedHat 7.3 with sendmail. When I try to send mail to some addresses : (ex: email@example.com ) I receive: The original message was received at Mon, ...
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- 03-28-2005 #1
- Join Date
- Mar 2005
error sending mail to some addresses
When I try to send mail to some addresses : (ex: firstname.lastname@example.org)
The original message was received at Mon, 28 Mar 2005 13:38:29 +0300
from localhost.localdomain [127.0.0.1]
----- The following addresses had permanent fatal errors -----
(reason: 501 5.7.1 <email@example.com>... Sender IP must resolve)
----- Transcript of session follows -----
... while talking to easynet.poinfor.net.:
>>> MAIL From:<firstname.lastname@example.org> SIZE=2174
<<< 501 5.7.1 <email@example.com>... Sender IP must resolve
501 5.6.0 Data format error
- 03-28-2005 #2
- Join Date
- Dec 2004
- Barrie, Ontario
Most major mail systems (yahoo.com, hotmail.com, etc) require that your IP has a reverse DNS entry. Unless you are on a higher end network connection, you're probably not going to get that.
That error means that they did a lookup on your IP and it has no FQDN attached to it.