After security, performance is the second most important aspect of

  • Bitmessage servers use OpenCL acceleration for Proof of Work
  • postfix is used as a mail server, and additional services are setup as milters

Altogether, an inbound email is processed almost instantenously. It may take longer if the sender does not have SPF setup correctly, this causes greylisting and the email is delayed.

For outbound email it should be about ten seconds. If you use server-side PGP, it may take even longer, one or two minutes, because the system is searching for the recipient’s PGP key on the internet.