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  1. #1

    What limits speed of email sending with dedicated server used as mail server?

    I'm trying to understand what limits the speed that email can be sent out on a dedicated server used as a mail server.

    What kind of speeds do you get? What hardware do you have?

    I've been told:

    throttle to 1 per second
    throttle to 2 per second

    others say they don't throttle at all and can blast out 10,000 in 1 hour.

    what is the biggest limiting factor? bandwidth, bandwidth, portspeed?

    Any information would be appreciated.

  2. #2
    Join Date
    Jun 2002
    There are three main limits:

    1. Bandwidth
    2. Software that deliberately throttles outgoing email
    3. Your hosting provider shutting down your server for spamming

    A modern server with even a 10mbit uplink should be able to do thousands of emails per minute.

  3. #3
    Join Date
    Dec 2004
    New York, NY
    Depends on the mail server you are running...[exim, qmail, etc.]

  4. #4
    What mail server is best...[exim, qmail, etc.]

    We won't be sending huge amounts of email.

    Typically what might happen is that 2-3 webmasters with customer lists of 5,000-10,000 might decide to send out at the same time. 30,000 emails at 1 per second could take 8 hours.

    Not good

  5. #5
    Join Date
    Jun 2002
    Any mail server can handle far more than one email per second; it's a question of how it's configured.

    Personally, I hate all mail servers, but with a special loathing reserved for Sendmail and Exchange.

    Qmail, Postfix, or Exim are relatively good bets. If you have CPanel you'll have Exim, and Plesk uses Qmail. I use Postfix on servers I set up manually.

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