All Questions
88
questions
0
votes
2
answers
2k
views
SMTP Relay - Keep sender SPF valid
We use a email setup (incoming mails) in the following order:
Internet -> on premises mailserver (=> attachment filter, antivirus, spam filter) -> forward to Microsoft 365 Exchange Online ...
0
votes
2
answers
415
views
Root domain in SPF record instead of full hostname
Can i use root domain like google.com instead of _spf.google.com in SPF record?.
My SPF record
v=spf1 include:_spf.mx.cloudflare.net include:_spf.google.com include:mxsmtp.sendpulse.com +a +mx ~all
...
1
vote
1
answer
359
views
I setup DMARC p=reject on server but now I can't send via gmail to gmail (using server email From address)
Did I shoot myself in the foot ?
I mainly use gmail to send and receive emails. Support etc. My default 'send email as' profile is not the gmail address itself but an address on my server (also the ...
- 113
0
votes
0
answers
457
views
configure iis6 smtp server to send from a specific IP
We have a dedicated Windows 2016 server that hosts multiple websites. Each site uses the IIS6 SMTP server to send emails from the websites (enquiries, order confirmations, etc.) - each site has a ...
- 1
1
vote
1
answer
899
views
How to replace "via amazonses.com" with my apps branding "via example.com" for the email identities in AWS SES?
So in SES - there are two ways to verify identities as I can see:
Email identities
Domain identities
With domain identiies - it is easier to fix the "signed-by" and "mailed-by" ...
- 135
1
vote
1
answer
2k
views
postfix: how to force IPv4 through SMTP?
Problem
I have successfully set up a Postfix mailserver with an SMTP interface, set up DKIM, DMARC, SPF, all that stuff.
But I had a problem when testing the delivery of emails to Gmail.
Namely, SPF ...
- 137
0
votes
1
answer
1k
views
Compared to SPF MAIL FROM checks, what are HELO checks good for? [duplicate]
I’m starting with SPF on my (email) domain. (No DKIM or DMARC yet.)
I see little usefulness in HELO identity checking in SPF and am thinking about setting the HELO identity to my domain (instead of ...
- 551
0
votes
1
answer
1k
views
Setup DNS records for SMTP send-only server
I have website on hosting with domain exmpl.com.
I have DNS record for exmpl.com:
exmpl.com MX(10) mail.exmpl.com
mail.exmpl.com A XX.XX.XX.XX
exmpl.com TXT v=spf1 +a +mx +a:hosting.server ~all
All ...
3
votes
1
answer
2k
views
Custom Return-Path for gmail domain
I do not expect my problem to be super-unique, but I was not able to find and answer so far even at Gmail help pages, and lots of googling with various terms did not provided a solution.
Context:
...
- 135
0
votes
1
answer
370
views
How to stop spammer spoofing my domain for emails
I've scanned all my code and even changed the passwords to my google apps account such that the SMTP password has changed. However, spammers are still sending emails from June24-eBay-USA-contactmsg-...
- 302
-1
votes
1
answer
4k
views
Unable to send email to gmail account from my mail server
I've created a mail server and have setup a PTR record from the ISP to my static IP server. The mail server works well and am able to send and receive emails and send mails to many email addresses ...
- 109
11
votes
2
answers
47k
views
How do I prevent the SPF_HELO_NONE warning when sending from Postfix?
When using a tool like https://dkimvalidator.com/ to verify configuration of DKIM, SPF, DMARC, etc. for sending mail from a web server, I get a warning like this:
0.0 SPF_HELO_NONE SPF: HELO does not ...
- 438
1
vote
2
answers
2k
views
DNS MX record and SMTP server
I have a SMTP server. DKIM is setup and working and have also setup SPF.
The SMTP host is smtp.domain.com
On the DNS I have a A record with smtp pointing to the IPv4 and a AAAA record with smtp ...
- 2,055
0
votes
1
answer
2k
views
SPF SOFTFAIL domain of transitioning [email protected] does not designate X.X.X.X as permitted sender)
in my company I have the following error.
softfail (google.com: domain of transitioning [email protected] does not designate X.X.X.X as permitted sender) client-ip=X.X.X.X;
Let's say my mail....
- 133
1
vote
2
answers
3k
views
All mails to Yahoo are deferred or in spam
i have read a lot about the problems of delivering mail to yahoo.com, i have contact the tech support but the result it's always the same: from my server all mails to yahoo./aol. are deffered and when ...
4
votes
1
answer
1k
views
Size of SPF with other TXT records
The SPF specification says:
The published SPF record for a given domain name SHOULD remain
small enough that the results of a query for it will fit within 512
octets. Otherwise, there is a ...
- 6,968
1
vote
2
answers
724
views
Email FROM header authentication using subdomain delegation
Our company owns the domain somecompany.com and uses an external email provider emailemailprovider.com to send emails. The email provider recommends to delegate a subdomain for them to automatically ...
- 261
0
votes
2
answers
1k
views
SPF record for SMTP server
I am trying to set up my SPF records to take into account that I send emails via office365 directly in Outlook etc. as well as in a web app hosted in AWS which sends email to smtp.office365.com (...
2
votes
2
answers
8k
views
How to read this DMARC report? Why does Yahoo still reject mails from my server?
I've got hMailServer set up on my server, which bulks-mails a newsletter to an opt-in subscriber base. I have set up DKIM signing, a SPF record explicitly giving my server permission to send email on ...
- 273
0
votes
2
answers
443
views
SPF records for a company with traveling (or remote) employees
I'm trying to set up a SPF record for the domain of a company whose employees use all sorts of SMTP servers..
But I think that line already contradicts itself ? Is this a problem ?
They use several ...
- 183
4
votes
1
answer
1k
views
Sending email using a third-party smtp requires an mta?
I have a G Suite account and want to use the Google's SMTP to send out emails from my server.
How can I then send emails from Linux's CLI? I read with some research that I need a program such as ...
- 213
1
vote
1
answer
500
views
You apparently created more than one SPF record on your DNS
I am getting this error from mail tester
What we retained as your current SPF record is:
v=spf1 include:sparkpostmail.com ~all
More information about this error:
You apparently created more than ...
- 1,459
-1
votes
1
answer
308
views
SPF Outlook Web App (OWA) undeliverable email
PROBLEM:
Outlook.com web app (OWA), synchronized with my local server via IMAP and SMTP(STARTTLS), returns "Undeliverable message" for all messages sent.
PROPOSAL: (rejected)
This returning message ...
1
vote
2
answers
1k
views
Multiple SPF entries in same or separate TXT records
I want to use a mass mailing service, e.g. sendgrid, mailgun, etc. And so I must update my zone file to include the correct SPF records.
Suppose my domain is example.com.
My DNS provider ...
- 978
4
votes
1
answer
279
views
How to recover domain name from previous bad SPF record?
TL;DR: We had SPF too permissive (+all) and spammers used this to send tons of spam "from" our domain. We restricted that to ~all and added DMARC (not DKIM though), now other providers do not trust ...
- 804
0
votes
1
answer
3k
views
Mail tester have 10 score, but email flagged as spam, by gmail
I have setup an smtp postfix server, with opendkim, on a domain code-gmail.com
I have put spf policy, dkim, dmarc in my domain TXT recors. I did setup reverse dns, to point correctly do my domain, i ...
1
vote
0
answers
2k
views
SPF softfail on gmail
I'm trying to setup my own smtp server with postfix and opendkim. I have publsished spf/dmarc/dkim recors, set up ptr. But currently, all my mail with any text goes into gmail spam folder. I have ...
1
vote
1
answer
343
views
SPF errors on a new domain name
I'm new to web hosting and configuring emails, and I was hoping I could get some help.
I purchased a reseller account and I set up my first cPanel account on a domain that I have. I then created a few ...
- 11
0
votes
1
answer
1k
views
Sending Mail where "mail from:" does not match own domain: problems with delivery / spam?
I want to send a bunch of E-Mails to different recipients. My sending server (myserver.com) ist set up correctly, i.e.:
1. EHLO command, hostname and A DNS record do match
2. PTR record matches ...
- 121
1
vote
1
answer
788
views
Does a nested hardfail statement in an "include:" SPF entry take priority over a softfail in the parent entry?
Let's say I have a SPF record that reads:
v=spf1 include:_foo.example.com ~all
and let's say that _foo.example.com has the following:
vspf1 ip4:1.1.1.1 -all
Does the -all entry in the nested spf ...
- 12.1k
1
vote
1
answer
804
views
Outlook is rejecting emails without any notification
i have configured postfix with opendkim. Everything is working fine, I have tested DKIM records as well as DMARC and SPF, everything seems fine. I am also receiving emails on my gmail account in Inbox....
- 63
2
votes
2
answers
2k
views
Multiple mail servers and reverse DNS
If I have three mail servers MS1, MS2 and MS3 all with different IPs but share the same domain name (exampledomain.com) and I use an SPF record to specify them, how would reverse DNS work on the ...
- 43
1
vote
1
answer
1k
views
Postfix with SPF bouncing email forwarded by gandi SMTP
Description
I have a postfix/spf misconfiguration.
I have a YunoHost handling mydomain.org (DNS and SMTP/IMAP)
I have superdomain.com registered at gandi, and I let the MX records with the mail ...
- 173
0
votes
2
answers
3k
views
how does _spf work on a DNS level?
i have noticed that google and other domains use _spf for their domain. i would like to how this works.
would _spf be an a record that has multiple IP that would account for all mail servers or does ...
- 13
1
vote
2
answers
48
views
sending emails from different Smtps in different IPs
I sent mails with different Smtps for example Smtp1 on IP 1.1.1.1 and Smtp2 on IP 2.2.2.2 . which my spf record for the From ([email protected]) part in emails is :
spf1 include:mail.mydomain....
- 113
1
vote
1
answer
997
views
Can I retrieve email marked as rejected in the SMTP log?
I am using a Sophos UTM 9 SG210 firewall and noticed in the SMTP log that a formerly trusted sender has had 50 legitimate emails rejected. I've since added them to an exemption list, but was ...
- 135
1
vote
1
answer
394
views
SPF redirect modifier
The SPF record for domain replace the current record. The
macro-expanded domain is also substituted for the current-domain in
those look-ups.
Examples:
In the following example, the ...
- 113
0
votes
2
answers
1k
views
IIS Smtp server cannot send to hotmail,outlook, etc addresses
I have a SMTP server on a Windows server 2008 R2.
It can send messages to all other domains except the ones hosted at Microsoft (hotmail.com,outlook.com, etc).
The email messages it cannot send remain ...
-1
votes
1
answer
161
views
Mail server with different IP than webserver - getting 554 error
I have a webshop running on a Digital Ocean droplet, while the email inbox for the same domain is running on a different VPS. All of the sudden some of the emails sent by the webshop are being ...
0
votes
1
answer
3k
views
What can I do if an SPF hasn't propagated weeks or months after being changed? How to force SPF to propagate?
I set up a domain, SMTP mailserver etc on a Centos box a few months ago, including PTR records that looked like this:
pop PTR XX.XX.XX.XX.
www PTR XX.XX.XX.XX.
mail PTR XX.XX.XX.XX.
Everything ...
2
votes
1
answer
569
views
Exchange Online, Mandrill, SPF and DKIM
I have a customer ABC Ltd (abc.ie) who has a requirement to send emails via SMTP to their own customer base from within an application that we have developed for them.
For their company email they ...
- 503
0
votes
2
answers
458
views
How do I send (legitimate) email on a dedicated server as appearing from different domains?
We need to send email using PHP's mail() function (Actually CakePHP, which wraps that function) directly from our dedicated server (app.ourserver.com). We would like to send mail from app.ourserver....
- 3
-1
votes
1
answer
492
views
Add a second IP to SPF record, from an external SMTP server [closed]
I would like to add the IP of an external SMTP server to an existing SPF record, which is looks like this:
"v=spf1 a mx ip4:185.6.139.6 a:frey.mailpool.1.netmask.hu a:frey.mailpool.2.netmask.hu a:...
4
votes
1
answer
9k
views
How to setup postfix to check SPF record only for domains that i want to check
I have working postfix server. It configured with amavis and uses pretty good SMTP headers control. But sometimes my users receive spam from spammers with well known mail service providers addresses. ...
- 63
15
votes
2
answers
19k
views
What does dis=NONE mean in an email's Authentication-Results header?
The following is from an email I received recently:
Authentication-Results: mx.google.com;
spf=neutral;
dkim=pass [email protected];
dmarc=pass (p=REJECT dis=NONE) header.from=...
- 274
1
vote
0
answers
2k
views
SMTP error : Remote host said: 550 5.7.1 At least one FROM header address not allowed to send mail from IP ADDRESS
We are developing an email sending app, and we allow our users to specify the From: header their emails will be sent from.
Let's say our domain is mydomain.com and our client domain is clientdomain....
- 237
0
votes
2
answers
583
views
I am able to receive mails but unable to send via my SMTP server?
I have a shared hosting server from hostgator, in which I created an email '[email protected]'. Then I enabled both DKIM and SPF (as I read on a few threads that SPF should be enabled to ensure a ...
- 127
0
votes
1
answer
638
views
Failed Gmail SPF check when importing mail through IMAP from our mailbox when original email was sent with ESMTP headers
We have a strange situation:
we receive an email with ESMTP headers in it
our server accepts it, it's fine
we import that mail in Gmail like any other emails from our boxes
Gmail makes SPF check ...
- 175
2
votes
1
answer
4k
views
SPF records when sending multi-domain emails from one host
We have a CMS system in which multiple customers run their websites from a single virtual machine. Pages generated by the CMS allow forms to be filled in, which trigger emails to be sent. I am having ...
- 123
1
vote
1
answer
441
views
google apps mail error
In recent months, we have big problems when we send email on our own mailing list (for safety, I'll call our domain name example.com) [email protected]. All users receive this kind of mail back from the ...
- 51