Topic: Rejecting Invalid Recipient (550) Email

[jfarschman]

Hi,

  In the server-manager we have the ability to "return to sender" or forward to a user an messages that are "Email to unknown users".  But I've got some body fishing for email addresses.

  What do you guys do about this?

  I have numerous (6000 in the past 12 hours) messages in the qpsmtpd logs for 550 invalid recipient.

@4000000044feb313299846fc 13431 550 invalid recipient sergeujud@hitechsavvy.org
@4000000044feb36327d428cc 13484 550 invalid recipient rusk@hitechsavvy.org
@4000000044feb37a19726d5c 13485 550 invalid recipient encar@hitechsavvy.org

  Do we just ignore this?

[raem]

jfarschman

Be glad that your server is doing its job and rejecting those messages
Just ignore the log entries.

[jfarschman]

Ray,

  Thanks.  I just wondered if there was a better way of handling things.  Seems like were are letting them fish for valid addresses.

  But there isn't a mechanism for stopping a server that tries 10,000 times in a dies and gets denied.  No problem.

[raem]

jfarschman

> Seems like were are letting them fish for valid addresses.

It's a robot trying many different combinations because it DOES NOT know your valid addresses.


If you have spare time you can block the source IP with a db command, but keep in mind "they" will send from a different IP next time & so on, so you will just be chasing yor own tail entering IPs to block.

[kruhm]

find the ip range and block the whole range. that should do it. or, if you need, block the whole country