Sendmail "Domain of sender address does not resolve"
by mfoley from LinuxQuestions.org on (#4SHB7)
This is probably simple, but ... I am trying to send a message to myself from a customer's Slackware64 14.2 with Sendmail 8.15.2. From the customer's host the message is:
mail -r noreply@ohprs.org -s "testing" mfoley@novatec-inc.com
On that host's maillog I get:
Code:Oct 14 11:44:41 OHPRSstorage sendmail[8733]: x9EFifTg008733: to=mfoley@novatec-inc.com, ctladdr=noreply@ohprs.org (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30307, relay=[127.0.0.1] [127.0.0.1], dsn=4.0.0, stat=Deferred: 451 4.1.8 Domain of sender address noreply@ohprs.org does not resolveYet the host does resolve on both the customer's computer and the receipient computer:
Code:$ host ohprs.org
ohprs.org has address 98.102.63.107
ohprs.org mail is handled by 10 mail.ohprs.org.This IP is not blocked by any firewall on the sending computer, the customer's mail server or the recipient computer.
This used to work until recently.
Ideas?
mail -r noreply@ohprs.org -s "testing" mfoley@novatec-inc.com
On that host's maillog I get:
Code:Oct 14 11:44:41 OHPRSstorage sendmail[8733]: x9EFifTg008733: to=mfoley@novatec-inc.com, ctladdr=noreply@ohprs.org (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30307, relay=[127.0.0.1] [127.0.0.1], dsn=4.0.0, stat=Deferred: 451 4.1.8 Domain of sender address noreply@ohprs.org does not resolveYet the host does resolve on both the customer's computer and the receipient computer:
Code:$ host ohprs.org
ohprs.org has address 98.102.63.107
ohprs.org mail is handled by 10 mail.ohprs.org.This IP is not blocked by any firewall on the sending computer, the customer's mail server or the recipient computer.
This used to work until recently.
Ideas?