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QK SMTP Server is a powerful but extremely easy-to-use smtp server software, which can send mails from local host to the recipients' mailboxes directly at an amazingly high speed. Arrived or not, you will get feedback instantly.

QK SMTP Server is a powerful but extremely easy-to-use smtp server software, which can send mails from local host to the recipients' mailboxes directly at an amazingly high speed. Arrived or not, you will get feedback instantly.

QK SMTP Server can work with most mail clients, including Outlook Express, Eudora, IncrediMail, the Bat!, Mutt, KMail, Pegasus, DevMail, Mail Bomber, Delta Mail, Foxmail, and more! QK SMTP Server can also work with most mass email sender software so as to improve their performance in an amazingly way!

You can never imagine that emails go so quick! You can even get an immediate feedback, whether the email arrives or not.
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Fast mailing with multithreads technology

You can send mails directly from your own computer via QK SMTP Server instead of waiting for connecting and applying with your ISP's SMTP server. By setting send thread (1~100), you can complete 500~2000 mails in one minute.

Three modes to send emails

QK SMTP Server boasts three modes to deliver emails:
A: Send directly to recipients' mail boxes;
(In this mode, all emails will arrive destination mail box with an instant feedback.)

B: Send via a transit SMTP Server;
(In this mode, all emails are relayed to your ISP's SMTP Server.)

C: Send directly first; if it failed, relay to transit SMTP Server.
(Emails will be relayed to your ISP's SMTP Server if the first attempt to send directly fails.)

Get correct and instant feedback

You also can get correct and instant feedback from the recipients' mail server when sending mails at a high speed via QK SMTP Server.

Supports SMTP Authentication before sending emails

QK SMTP Server supports SMTP Authentication before sending emails. Therefore you can kick off those anonymous users who are going to abuse your computer.