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If you are a heavy user of the mailFISH service you might be interested in purchasing additional credits for the reception of E-Mails behind firewalls and proxies. You can do so on this page.

In order to avoid spamming by use of the mailFISH, to fund bandwidth and to ensure a particularly high quality of service, the use of the mailFISH service is based on a credit system.

Accordingly, the free version of the mailFISH service is limited to 50 tunnelled mail transmissions per day. It is important to understand that this limit only affects messages you receive behind firewalls or proxies. For direct communication with your mail servers (i.e. whenever POP3/SMTP servers can be reached from your current network position) of course no credits are necessary and no costs arise. In the default setup, the mailFISH client automatically detects which form of connection is available.

If you need to receive additional messages behind firewalls or proxies, you can purchase additional credits right here. This is how it works:

  1. In the form below, first select the desired credit volume and payment model. Enter your E-Mail address/the address you want to purchase credits for and start the upgrade process by clicking "Buy now".
    Purchase additional credits
    Credit Volume:
    Your E-Mail Address:

    Note: We will communicate with you through this address. It is also the account the upgrade becomes effective for. If you want to purchase credits for a different address, please get in touch with us.

    I have read and do accept your terms & conditions
  2. Once your payment has been processed we will send you an E-Mail message, notifying you that your credits have been activated and your account has been upgraded.
  3. Receive additional mail messages by use of the mailFISH client from then on.

If you have any further questions, please do not hesitate to get in touch with us.

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