1. Underground Forum

    Email marketing Mail server on CentOS in 5 minutes

    Configure a mail server via bash script From this manual you will learn how to configure Postfix-based mail server using a bash script. The script will configure and install Roundcube Webmail, Postfix and Dovecot automatically, also it create mailboxes based on your domain(s). The cheapest VPS...
  2. Underground Forum

    Email marketing Email Headers

    How to read Email Headers Received: by 2002:a17:906:742:b0:958:803f:dba7 with SMTP id z2csp1282371ejb; Sun, 7 May 2023 03:23:01 -0700 (PDT) X-Received: by 2002:a17:907:3ea8:b0:953:37d9:282f with SMTP id hs40-20020a1709073ea800b0095337d9282fmr6314816ejc.38.1683454980797; Sun, 07...
  3. Underground Forum

    Email marketing Mail bounces

    Common mail bounces and their description Hard bounce The response from the remote server was: 550 5.7.1 No such user! 1683454980-0NPfrE8P9Cg0-eRlBSO3h Hard Bounce - Indicates a permanent reason why the email could not be delivered. Causes for a hard bounce: The recipient's email address does...
  4. Underground Forum

    Email marketing Spam traps

    What is a spam trap? Spam Traps are a fairly effective way to detect spammers and are currently used by most email providers. If you ignore spam traps, they can negatively affect your domain's reputation and cause blocking. The main types of traps Parked Traps. These are email addresses...
  5. Underground Forum

    Email marketing Configure DNS for mail server

    Basic dns settings for mail server Name Type Value Additional A (internet address v4) A (internet address v4) A (internet address v4) A (internet address v4)
  6. Underground Forum

    Email marketing How to setup a DKIM signature

    What is a DKIM signature? The DKIM signature is used to authenticate the sender's email address. DKIM key generation First of all, you need to generate a pair of DKIM keys, public and private. Public key example: -----BEGIN PUBLIC KEY-----...
  7. Underground Forum

    Email marketing How to setup a DMARC signature

    What is a DMARC signature? The DMARC record is designed to protect your domain from phishing and improve the deliverability of your emails. DMARC determines which rules will be applied to your outgoing emails that are not authenticated. Setting up a DMARC signature In the DNS settings of the...
  8. Underground Forum

    Email marketing How to setup an SPF signature

    What is SPF signature? SPF (Sender Policy Framework) is a TXT record with ip addresses which allow to send emails from your domain. This technology is designed to protect your domain from spam and improve email deliverability. Set up an SPF record signature In the DNS domain settings, create a...