B
bennetthaselton
I am trying to migrate my website and mail server to a new VPS at the IP address 65.181.125.58. To test whether receiving mail is set up correctly, I used my third-party server 66.90.104.230 and tried telnetting to 65.181.125.58 port 25 to send mail, but I got the error "Relaying temporarily denied. Cannot resolve PTR record for 66.90.104.230":
(I tried multiple times to post the entire transcript of the conversation with the SMTP server, but linuxforums kept blocking it because of at-signs or hostnames that looked like websites, so I am only able to post the last line of the exchange, but I hope this makes it clear what the problem is):
450 4.4.0 Relaying temporarily denied. Cannot resolve PTR record for 66.90.104.230
The odd thing is that I've found multiple sources claiming that sendmail "by default doesn't deny relaying based on a missing PTR record", e.g.:
objectmix.com/sendmail/211946-cannot-resolve-ptr-record-stopping-relay.html
.experts-exchange.com/Software/Server_Software/Email_Servers/Q_21411329.html
(linuxforums will not let me post those as actual clickable urls because I'm a new user, but you get the idea)
but here that's exactly what sendmail is doing even though I haven't changed any options. How do I get it to stop?
I don't want to set up a PTR record for 66.90.104.230, I want to make sure the new VPS accepts mail from IPs without a PTR record since that's the way the old VPS worked and I can't risk causing any breakages by changing the way mail is handled.
At peacefire.org/sendmail.mc I have posted a copy of my sendmail.mc file. Note in particular the line
FEATURE(`accept_unresolvable_domains')dnl
which made me think I definitely wasn't supposed to get this error.
Continue reading...
(I tried multiple times to post the entire transcript of the conversation with the SMTP server, but linuxforums kept blocking it because of at-signs or hostnames that looked like websites, so I am only able to post the last line of the exchange, but I hope this makes it clear what the problem is):
450 4.4.0 Relaying temporarily denied. Cannot resolve PTR record for 66.90.104.230
The odd thing is that I've found multiple sources claiming that sendmail "by default doesn't deny relaying based on a missing PTR record", e.g.:
objectmix.com/sendmail/211946-cannot-resolve-ptr-record-stopping-relay.html
.experts-exchange.com/Software/Server_Software/Email_Servers/Q_21411329.html
(linuxforums will not let me post those as actual clickable urls because I'm a new user, but you get the idea)
but here that's exactly what sendmail is doing even though I haven't changed any options. How do I get it to stop?
I don't want to set up a PTR record for 66.90.104.230, I want to make sure the new VPS accepts mail from IPs without a PTR record since that's the way the old VPS worked and I can't risk causing any breakages by changing the way mail is handled.
At peacefire.org/sendmail.mc I have posted a copy of my sendmail.mc file. Note in particular the line
FEATURE(`accept_unresolvable_domains')dnl
which made me think I definitely wasn't supposed to get this error.
Continue reading...