All Questions
Tagged with spf ptr-record
15
questions
0
votes
1
answer
1k
views
Postfix - can't send emails to gmail addresses via terminal
I have the following errors when trying to send emails to gmail addresses via my terminal:
sudo tail /var/log/mail.log
Jul 19 13:19:44 ubuntu-4gb-fsn1-1 postfix/cleanup[5780]: B4B8C5F4A3: message-id=&...
- 101
0
votes
1
answer
1k
views
SPF Too Many DNS Lookups issue
In our scenario, We're running into an issue with our SPF records in route53. We are receiving SPF Too Many DNS Lookups because we are using multiple mail services. Is there a way to resolve this? I ...
1
vote
1
answer
540
views
email validation: is there any point doing both SPF *and* reverse DNS tests?
For a receiving MTA, it seems to be unnecessary to check both the SPF record for an incoming SMTP connection, and to do an rDNS/PTR lookup.
Consider:
Server gets SMTP connection from aaa.bbb.ccc.ddd, ...
- 223
0
votes
2
answers
2k
views
Is PTR record needed if SPF record points to IP
If sending email as [email protected] from mail server 1.2.3.4, and the SPF record of mydomain.com set as
"v=spf1 ip4:1.2.3.4 -all"
Will a PTR record do any good? Is PTR required for some e-mail ...
1
vote
0
answers
125
views
FCrDNS for a mail server that also runs other services (http, ftp etc)
I am learning how to administer productive internet-facing machines and services, and towards that end setting up mail, web, and a couple other services, all on the same box (budget constraints and ...
- 111
0
votes
1
answer
232
views
Format for/creation of PTR and SPF records?
Let's say that I have a server that resides at Linode that I use for my business, mybusiness.com. It has an IP Address of 1.2.3.4, and an A record of myserver.mybusiness.com. I own the domain name ...
- 190
0
votes
1
answer
916
views
Using PTR on SPF Record and Multiple Domain Pointing Single Server
Today I've checked my SPF is valid on some of the sites and invalid on some of the sites I've tested.
Microsoft also couldn't see my SPF record for some reason while others can.
(Sender ID ...
- 237
5
votes
2
answers
16k
views
Do I need to Set-up PTR record in SPF Setting?
I have set-up the RDNS from my hosting provider for the ip address to resolve to "maximus.example.com". After that, do I also need to add the PTR records to the SPF Text details in my DNS zone file as ...
- 1,481
0
votes
1
answer
80
views
DNS issue mail server
I tried to find an answer to this one around with no luck so far. I am not a sysadmin, but I work with mailings and one of our server presents some issues.
I do not have personal access to the server, ...
- 5
2
votes
1
answer
92
views
PTR Webserver and Appserver
I'm a little confused about the setup of a PTR record for reverse dns lookup.
We are hosted at Rackspace and we have a front end webserver and behind that an appserver. Users don't access the ...
- 123
0
votes
1
answer
295
views
Dns filezone setup with mx and spf
I am trying to create a mail server. I bought the domain mastermails.info on godaddy.com. I am struggling with the setup of DNS. Whenever I change something in the MX record to make my server ...
- 11
0
votes
1
answer
101
views
Google gmail block for no ptr of 4to6 ip address
When mail server got only ipv4 address and enabled 4to6 interface, gmail server block mail because of no ptr record of 4to6 address.
Why...?
Isn't 4to6 address not global standard...?
- 46
0
votes
1
answer
781
views
rDNS setup to prevent emails appearing as spam / phishing messages
We are trying to send email without the email appearing in the spam folder. The emails that we are sending is solicited bulk email. The main problem is that the emails are appearing as phishing ...
1
vote
1
answer
849
views
Is it safe to use ptr in SPF?
Suppose you have the domain yourdomain.com, and you have set the following SPF:
v=spf1 +ptr:yourdomain.com ~all
Now, I have the IP address 1.2.3.4, and I am also the administrator of 3.2.1.in-addr....
- 2,626
1
vote
3
answers
10k
views
Hotmail wants me to modify my SPF record
This is my current SPF record. It works well with gmail and yahoo but hotmail was ignoring. So i used their submit system and now they replied me with the text below.
This is my current spf
v=spf1 a ...
- 576