SMTPSimple Mail Transfer Protocol, communication protocol that describes the way in which e-mail is transferred.

SMTP Server – Outgoing mail server. A machine which is used for e-mails send out.

Computing cloud – solution that allows a transfer of all IT services to servers and makes access via client’s computers available. Thanks to this a user does not have to invest in infrastructure and expensive software.

DKIMDomainKeys Identified Mail, a method of linking internet domain with e-mail message, which allows an organisation to have full accountability for message’s content. DKIM signature secures from spoofing as a sender from different domains.

DMARC – a technique used for e-mails sender authentication through suitable configuration of both the domain and the e-mail message itself. More information on DMARC can be found here.

SPFSender Policy Framework is a safety protocol for incoming mail servers, which protects them from accepting messages from unauthorised sources. SPF was created to limit the number of SPAM messages. More information on SPF can be found here.

IP – Unique address given to a network interface or a group of interfaces.

Dedicated IP – an IP address that is dedicated to only one user. Thanks to it a user can independently take care of his reputation without anybody else having any influence on it.

Shared IP – an IP address used by multiple users and/or organisations. In such case reputation is influenced by a sum of all users’ activities.

Link tracking – a feature that allows you to check who clicked at a link placed in your message. More information on Link Tracking can be found here.

Open tracking – a feature that allows you to check who clicked at a link placed in your message. More information on Link Tracking can be found here.

Whitelabel – a function that works together with “unsubscribe”, link tracking and open tracking. Thanks to it, all included links in your message will have an address containing your domain. It will give your messages extra protection from being blocked by e.g. Gmail. In order to learn how to enable Whitelabel read article here.

Tags – text tags used for content marking and highlighting.
Example: you can mark registration confirmation messages as e.g. “registration” and track deliverability of marked messages to users. Each message can have an unlimited number of tags.
More information on Tags can be found here.


Transactional messages – All operational messages. Most often automatically generated by IT systems that can initiate e-mail send-out. Transactional messages are usually expected by a receiver and thus should be delivered promptly after user completes an action. Registration confirmations, password resets, notifications, information on order’s status change, invoices, customer service messages are some of the transactional messages examples.

Commercial (marketing) messages – messages that aim is to promote products or services. These messages are usually send in big amounts. Newsletters, promotions, coupons, discounts, offers are some of the marketing messages examples.

SPAM – Unwanted e-mail messages. A message to be qualified as SPAM under three conditions:
– Message’s content is not compatible with receiver’s identity and needs,
– Receiver did not give a consent for receiving messages,
– Sender, as a result of a send out, can benefit disproportionately more than the receiver.

SPAM traps – an inbox created by e-mail service providers (Gmail, Yahoo, AOL etc.) for identification of people sending SPAM. These can be new addresses or addresses inactive for over 12 months, which were converted into SPAM traps. To avoid SPAM traps you should regularly clean your mailing databases. Moreover never buy or download databases from the web.

Blacklist – List of IP addresses and/or domain, that were identified as ones sending out SPAM. Presence on one of the major blacklists can cause serious problems with e-mail deliverability. At EmailLabs blacklist is a set of e-mail addresses, to which send out was blocked. More information can be found here.

Statusy email

Injected – Message was injected by you to EmailLabs system.

Ok – Message was accepted by receiver’s server – message was delivered.

Dropped – Message was not send by EmailLabs system, because of earlier placement of receiver’s address on a blacklist.

Softbounce – Information indicating that message delivery is temporarily suspended due to: receiver’s inbox being full, receiver’s server being turned off, or message being too big.

Hardbounce – Information indicating that a message was not delivered due to: send out to address or domain that does not exist, or receiver having e-mail message delivery blocked. All addresses that caused a hardbounce are automatically deleted from receivers database by EmailLabs.

Spambounce – Information indicating that a message was qualified as SPAM.

Deferred – Send out was temporarily suspended by EmailLabs.

Open – Receiver opened a message.

Track – Receiver clicked in a link placed in a message.