Sender Policy Framework is a standard by which the owner of a domain uses a specially formed DNS record to advertise which hosts are authorized to send email for the domain.

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How to prevent emails from my domain through mailing lists to be rejected due to DMARC

I operate my own mail server at speedofsoundgaming.com and mwtd.net. I recently added a DMARC record to my domain to help prevent spam, and once seeing that things seemed to be working, upped the ...
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2answers
391 views

Setting up SPF records on dedicated server

I have a question in regards to SPF records in a dedicated hosting environment. I wish to set up an SPF record for my dedicated server, but I am not sure whether my understanding is correct. First ...
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1answer
789 views

Why does the MXtoolbox SPF record checker not like my SPF record? [duplicate]

I have a shared hosting server and have been spilling my brains out trying to find a SPF record that is globally accepted by other hosts. Let's take the domain gimsid.ro. Which can send mail to any ...
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2answers
3k views

Office365 SPF PermError: Too many DNS lookups

We are migrating from a self hosted mailing platform to Office365 for Businesses. Everything went fine, except for the SPF record. At the moment, we have v=spf1 a mx include:spf.mtasv.net -all as TXT ...
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2answers
335 views

AWS SES TXT Record Content

I need to get AWS SES setup for a domain. The registrar's DNS tool only allows me to put in a block of text for the TXT/SPF records (one block per record). I'm not sure how to format the TXT record as ...
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2answers
5k views

550-Verification failed when forwarding email to some servers

I have a Postfix installed and working with SPF check and SRS-rewriting. When it forwards email for an external address, sometimes its smtp denies relaying the mail with the message: Relay access ...
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1answer
535 views

Why does Microsoft's own Sender ID wizard generate a SPF record instead? [closed]

I'm trying to create a Sender ID record for TurboLab.it with Microsoft's own Sender ID wizard but the wizard always return something like v=spf1 a mx ptr ip4:95.141.32.205 -all: this looks like SPF, ...
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1answer
8k views

How to resolve problems with spf / softfail?

I'm having problems with Google rejecting mail because of SPF problems. I thought I had this fixed, but evidently not... The mail is being sent from a Drupal site running mimemail. A message that ...
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1answer
561 views

Spf passes or fails depending on receiver address

I have postfix with dovecot set up on Ubuntu 13.10. I send emails via a node application (using email-templates). If I send an email from noreply@mydomain.com to myacccount@gmail.com (email 1), the ...
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1answer
3k views

Multiple SPF records for multiple domains

We have recently started using Office 365 for our email, which requires us to add a DNS TXT record with the value v=spf1 include:spf.protection.outlook.com -all. We already have an SPF record with the ...
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2answers
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Is the 10-DNS-lookup limit in the SPF spec typically enforced?

My understanding is that the SPF spec specifies an email receiver shouldn't have to do more than 10 DNS lookups in order to gather all the allowed IPs for a sender. So if an SPF record has ...
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Why is email being delivered normally despite an SPF “hardfail”?

I'm trying to figure out why forged email is being delivered to major email providers (gmail.com, outlook.com) even though email is marked with an SPF hardfail. The email is also delivered to ...
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1answer
3k views

DKIM and SPF for a subdomain

I manage a VPS on Linode accessed through subdomain.example.com and I need to send email from this subdomain. I can't set any TXT records in Linode DNS manager because the name servers for example.com ...
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2answers
176 views

How to properly set TXT SPF record when separating A from MX records [duplicate]

I have current TXT record for my domain: v=spf1 a mx ip4:{ip-of-my-server} -all Both email traffic and website goes to same machine. Now, I have to point website (A record) to other server. Will ...
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2answers
32 views

Precedence/co-existence of SPF and DKIM

Is co-existence of SPF and DKIM specified somewhere (assuming the absence of DMARC)? I want to put only my own IPs in the SPF and let 3rd parties send mail on behalf of my domain using DKIM. What ...
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1answer
90 views

spf and dkim records in the same dns zone file

I am trying to set up a mail server which will sign outgoing messages with a dkim signature. Part of that process is to set up a dns record for my senders domain with the public key of the key used ...
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2answers
256 views

SPF/DKIM Configuration for usage with critsend

I am currently facing the following issue: I have configured a domain of mine to be used with the Critsend mailing service. Their recommended configuration for both SPF and DKIM was implemented on ...
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2answers
205 views

Email flagged as spam or rejected by recipient mail server

I have configured SMTP service on a windows 2008 server. All the emails sent by the SMTP service are flagged as spam or they are rejected by the recipient of the email. In the header of the email I ...
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2answers
3k views

server's email going to spam for yahoo users, possible SPF issue? [duplicate]

Our website is sending out email verifications to members who sign up with our service. Yahoo is throwing our messages in the spam box and displaying this message in the headers: Received-SPF: none ...
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3answers
2k views

SPF TXT record with multiple senders - bounce back - spf check failed

My company uses office 365 for our email, but we also send email from one of our server's IP addresses. My TXT record is: v=spf1 ip4:XXX.XX.XX.XXX include:spf.protection.outlook.com -all ...
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1answer
477 views

hMailServer forwarding and distribution lists with SPF checking

I have installed and configured hMailServer, primarily to allow me to create a distribution list for a private organisation, and some email address aliases. This is so that members of the ...
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1answer
47 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...?
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0answers
466 views

SPF Check Failing Because Yahoo and Hotmail Looking for Zone File For Hostname

I have set up an SPF record that passes gmail's SPF record check, but not hotmail, yahoo, port25.com, isnotspam.com, or openspf.net. I believe the SPF record is properly set up for my domain, ...
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2answers
257 views

include:_spf.google.com not enough for hotmail

My spf is neland.dk descriptive text "v=spf1 a:mail6.paradiss.dk a:min.moar.dk a:arnold.neland.dk include:_spf.google.com -all" I get this error when sending from gmail.com as leif@neland.dk ...
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1answer
6k views

Is it OK to have multiple TXT records for a single domain containing different SPF entries?

A remote recipient domain is rejecting mail on the grounds of SPF and I think it's because the sender has SPF configured incorrectly. When I run dig, I see: [fooadm@box ~]# dig @8.8.8.8 -t TXT ...
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1answer
333 views

gmail contacts IP from SPF and fails to send mail to some domains

I have strange problem with my SPF records and gmail MX. I have this SPF setup v=spf1 a mx ip4:IP1 ip4:IP2 include:_spf.google.com ~all In this case, if I send an email to two specific domains, ...
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2answers
52 views

Is there any difference between different ways of expressing the same information in an SPF record?

I have a domain at example.com. The MX record is 10 cp.example.net. These domains are on two different IP addresses. Let's say that example.com is on 198.51.100.0, while example.net and cp.example.net ...
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1answer
135 views

DNS Redirect Website to another Server

I have two servers, server 1 and server2. The name serververs of the domain points to server1. 1.I have this configuration regarding Server1 DNS Zones: domain.com. 1200 IN A server2-ip Edit ...
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1answer
62 views

What to look for when using a 3rd party Email Enrichment Service - to secure our emails? [closed]

Our marketing team wants to use a 3rd party Email Enrichment Service. I want to try and tackle this, as I don't like the idea that my mail will go through a certified service and exposed. I know ...
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1answer
116 views

How does SPF reduce backscatter with a Google Apps account

Reading up on the SPF spec, I understand that SPF designates certain IPs as valid sender SMTP server IPs. For Google Apps, the SPF record is supposed to be v=spf1 include:_spf.google.com ~all. The ...
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1answer
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Configuring SPF, DKIM, Reverse DNS for VPS sending email through Google Apps SMTP servers

Today we realized that all of our emails being sent to email addresses of the type <username>@corporatedomain.com were getting rejected. I don't know who is hosting the email for ...
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2answers
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Office365 SPF record has too many lookups

For some utterly ridiculous administrative reasons we've got a split domain with one mailbox on Office365 which requires us to add include:outlook.com to our SPF record. The problem with this is that ...
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1answer
140 views

Icinga notifications are being marked as spam when sent to my mailbox

I'm using gmail and my domain is foo.com About half the notifications from my icinga server, icinga@foo.com go to my spam folder for me@gmail.com Received-SPF: fail (google.com: domain of ...
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2answers
1k views

TinyDNS and proper settings for SPF records [duplicate]

I've inherited a TinyDNS configuration that have following entries for SPF: @domain.com:x.x.x.3:a::86400 @domain.com:x.x.x.103:c:10:86400 =domain.com:x.x.x.3:86400 =mail.domain.com:x.x.x.3:86400 ...
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1answer
537 views

Failure notice with my mail server, what to do?

I've build a simple Mail server for my personal use, but Google reject my emails whatever I do. I worked hard finding the initials problems (wrong SPF entries in the DNS), but now, everything seems ...
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4answers
2k views

Why does my mail get marked as spam?

I Have the server "afspraakmanager.be". It matches everything not to be a spam server.(it isn't by the way): it has reverse dns, spf,dkim,... . But hotmail marks it as spam. I think the problem is ...
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1answer
509 views

SPF + ISP Smarthost, always untrusted?

One of the ways mail-servers protect themselves from spam is by SPF-records, a DNS look-up saying what ip-adresses are allowed to send mail from a given domain name. Another way the mail-servers use ...
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1answer
216 views

Is Sender Policy Framework (SPF) effective in preventing Phishing emails?

As defined in RFC4408, Sender Policy Framework only checks the envelope sender (aka MAIL FROM). The From: header is not being tested. As it is the value of the From: header which is usually displayed ...
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1answer
115 views

SPF record validation - best guess only

I administrate the domain [mydomain.com] which was until now only used for handling mail through Google Mail/Google Apps. Now I added a server which should be part of the domain without changing the ...
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1answer
133 views

Should I put SPF checks before or after RBL checks in Postfix SMTP server?

I am setting up a Postfix SMTP server (pre v2.10) and was thinking to put the smtpd_recipient_restrictions as follows. smtpd_recipient_restrictions= permit_mynetworks, ...
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1answer
1k views

Using “mx ptr” parameters in DNS SPF record

I'm trying to set up my SPF record to validate properly both for emails sent through Google Apps and for those sent from MailChimp's servers. MailChimp's docs recommend this SPF record: v=spf1 mx ptr ...
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1answer
200 views

What will be the SPF entry in DNS?

We are using magento on our server. Magento sent transactional emails directly from our server using php mail function, along with this we are using third party webmail service. Means our mx entry ...
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1answer
2k views

Assistance diagnosing SenderID PermError in Exchange 2010

We're having issues with a customer's domain. They're wanting to do a mail-out with a service called Act-On, and so far all the tests seem to be getting flagged as spam. The customer has tried ...
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3k views

Combining multiple SPF records - SenderID - kind of lost

Tried to read up on SPF record creating but I am a bit lost. I need to combine and create an SPF record because our email is not getting through. Here are the ways we send email: Daily ...
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3answers
6k views

Why is my email failing Gmail's DKIM test?

I have a message that was rejected by Gmail, I don't know why. It passes SPF. We aren't using DKIM. Do I need to set up DKIM? I am in control of "example.com". Our mail server is "server.example.com" ...
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2answers
651 views

How to setup spf1 record Using Cloudflare, outlook.com and sending mail directly from php server?

I have a web server with a community website on it, and 1 subdomain on another ip. I use Cloudflare, and made outlook.com handle my mail for me. However my web server also sends mail. For example, a ...
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1answer
55 views

SPF record configuration [duplicate]

I am a bit confused about the creation of SPF records. I have my hosting domain: hosting.mydomain.com, this is the hostname of the actual server running postfix etc. I have configured my DNS like ...
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1answer
42 views

Next Step in Migrating Exchange 2003 to GMail (SPF risks when changing MX record vs disable SMTP)

Our company has been struggling to migrate Exchange to GMail for last 2 years (I will leave this for /r/talesfromtechsupport). We have two domains on two different ccTLDs, and lately Exchange is just ...
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2answers
517 views

SPF: Difference between v=spf1 include:_spf.google.com ~all and v=spf1 include:spf.google.com ~all

What is the difference between v=spf1 include:_spf.google.com ~all and v=spf1 include:spf.google.com ~all (the first one is with underline character in front of the spf, the second one without)
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3answers
498 views

SPF Records for QuickBooks Online

QuickBooks online sends email from the email address listed on the account. This is always going to be the email address of the business rather than an email address that Intuit have permission to ...