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  1. #1
    Join Date
    Aug 2002
    Superior, CO, USA

    Huge number of address probes - anybody else?

    My host is being hit with a huge number of email address probes from addresses. They are all like:

    May 4 09:55:50 habanero postfix/smtpd[9685]: reject: RCPT from[]: 550 <nanette@[mydomain].com>: User unknown; from=<[email protected]> to=<nanette@[mydomain].com>

    but the name in the "to" address changes each time. I guess they are just looking for valid email addresses. I've gotten about 4000 of these since Sunday. Anybody else? Short term I've blocked for port 25 but I can't keep that around for long. I contacted their abuse department but have not heard back yet.

  2. #2
    We get a huge amount of probs from Comcast/other broadband subscribers as well. Most likely SPAM scripts searching for an open relay. If you e-mail software is not running in open relay mode you should be fine.

    Hope this helps,

    The Maag Group - Intelligent IT Solutions
    Colocation Dedicated Servers Server Administration 877.622.4477

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