dkim   755

« earlier    

Set Up Custom Domain Authentication: DKIM and SPF
Set up your custom domain authentication so campaigns appear to come from your domain. Make your campaigns look more professional and avoid spam folders.
dkim  spf  email  domain  dns 
10 days ago by jennettefulda
DKIM Core is a way to attach a token (or tokens) to an email that tells the recipient who is responsible for the email (typically the token would represent the author of the email, the operator of the email service, or the owner of a mailing list, but it might also represent others, such as email reputation or certification services).
Who is it for?

It is for anyone who sends email and owns their own domain name. It is likely to be most useful for senders of bulk email (whether they send the mail themselves or have the mail sent on their behalf by a third party email service provider), but is also useful for enterprises, consumer ISPs and anyone else who sends email.

DKIM Core is not intended for use by those who receive email. Receivers wishing to support DKIM Core on inbound email should implement DKIM (, as described in RFC 6376 (
mailserver  mta  sendmail  dkim  spam 
19 days ago by dusko
Use DKIM to validate outbound email sent from your custom domain in Office 365 | Microsoft Docs
Summary: This article describes how you use DomainKeys Identified Mail (DKIM) with Office 365 to ensure that destination email systems trust messages sent from your custom domain.
office365  dkim  info 
8 weeks ago by natedoc
[SOLVED] DKIM, DMARC, and third-party senders - Office 365 - Spiceworks
Ask the vendor NOT to forge your email address in SMTP envelope (MAIL FROM). It is okay to do it in the email header (From header).

DMARC - This will pass as long as either SPF or DKIM passes.

SPF - This is done against envelope MAIL FROM, not email header. Therefore, if the vendor uses their own domain in MAIL FROM, this will pass

DKIM - They should not be signing the email with DKIM. That is because the From header in email will be yours.

Since SPF will pass, so will DMARC and your recipients will not block the message. Check this page ( for differences between Envelope From and Header From.
mailserver  mta  spam  spf  dkim  dmarc 
8 weeks ago by dusko
Envelope vs Header FROM - Difference between envelope and header from
The sender's email address is specified twice when email messages are delivered from a sender to recipient. This article explains the difference between these two addresses in non-technical terms.

As described in another article that talks about SMTP Relay, the design of our modern email system is based upon snail mail. Therefore, in order to understand how email works, we are going to analyze how snail mail works.

There are two parts of any package you receive from your regular postal mail: An envelope and a letter inside that envelope.

Similarities with Email
Since email systems are designed based on snail mail, it also contains an Envelope and Letter. There are a few differences, which are mentioned below. This communication is based on RFC 5321 (

When users receive the email, they do not see the envelope. Email clients only display the "Letter". This message must conform to rules specified in RFC 5322 (
mailserver  mta  smtp  spam  spf  dkim  dmarc 
8 weeks ago by dusko
Prevent spoofing with DKIM –
# Domain to use for DKIM signing: can be “header” (MIME From), “envelope” (SMTP From) or “auth” (SMTP username)
use_domain = “header”;
mailserver  spam  mta  spf  dkim  dmarc 
8 weeks ago by dusko

« earlier    

related tags

:velomail:toimplement  admin  adopt  api  audit  authentication  aws  bestpractices  blog  bypass  cert  check  checker  cli  crypto  debugging  deliverability  devops  diagnostics  distributors  dmarc  dns  domain  dovecot  email  emails  factoring  filters  finger  flexwebhosting  freebsd  gmail  google  hosting  howto  howtos  identity  ifttt  iis  info  infosec  jangosmtp  ket  keys  lang:en  ldap  linode  linter  linux  lookup  mail-domain-signing  mail  mailserver  malware  michaelorlando  microsoft  mta  networking  office365  opendkim  openldap  opensmtpd  pgp  phishing  plesk  pocket  policy  postfix  privacy  qmail  qmailtoaster  records  reference  reputation  route53  rspamd  securite  security  sendgrid  sendmail  sieve  smtp  solr  spam  spf  spf_tool  spoofing  ssl  stefano  styleguide  sysadmin  tls  to  tool  tools  tutorial  twitter_favs  validation  verification  webfinger  webfist  webmaster  wired  zachharris   

Copy this bookmark: