Re: sendmail autoresponder
In the last episode (Feb 17), Dave said: I've got a box that i took over that runs sendmail, mailscanner, and sa for antispam. There's an email address at one of the domains that the owner has indicated he would like an autoresponder hooked to it. THe objective is whenever someone sends to that address it won't be delivered to a mailbox, but dropped and the autoresponder msg will be sent back. I'm a sendmail newbie in the extreme and would appreciate any advice. Maybe /usr/bin/vacation will do what you want? Autoresponding isn't really the MTA's job, so if you have used some other tool with another MTA, use it here. -- Dan Nelson [EMAIL PROTECTED] ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: sendmail autoresponder
On 2006-02-17 11:24, Dave [EMAIL PROTECTED] wrote: Hello, I've got a box that i took over that runs sendmail, mailscanner, and sa for antispam. There's an email address at one of the domains that the owner has indicated he would like an autoresponder hooked to it. THe objective is whenever someone sends to that address it won't be delivered to a mailbox, but dropped and the autoresponder msg will be sent back. I'm a sendmail newbie in the extreme and would appreciate any advice. You can enable the `blacklist_recipients' feature, by adding this to your sendmail.mc file: FEATURE(`access_db', `hash -TTMPF -o /etc/mail/access') FEATURE(`blacklist_recipients') Then, adding entries like this to /etc/mail/access and rebuilding the access.db map will block email for the particular address: To:[EMAIL PROTECTED]REJECT or even the more descriptive: To:[EMAIL PROTECTED]ERROR:550 Mailbox disabled for this recipient If you need more help for making the `access.db' map work and updating the configuration files in `/etc/mail', feel free to ask. - Giorgos ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: sendmail autoresponder
This isn't a sendmail solution, but I use openwebmail for my company's webmail interface, and it has an autoresponder option. It'll send back an email response, and you can simply set up filtering to dump the incoming mail to the trash folder. -jim - Original Message - From: Dave [EMAIL PROTECTED] To: freebsd-questions@freebsd.org Sent: Friday, February 17, 2006 11:24 AM Subject: sendmail autoresponder Hello, I've got a box that i took over that runs sendmail, mailscanner, and sa for antispam. There's an email address at one of the domains that the owner has indicated he would like an autoresponder hooked to it. THe objective is whenever someone sends to that address it won't be delivered to a mailbox, but dropped and the autoresponder msg will be sent back. I'm a sendmail newbie in the extreme and would appreciate any advice. Thanks. Dave. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
RE: sendmail autoresponder
You do NOT want to setup an autoresponder like vacation! The FEATURE method that Giorgos explained is the correct way to do it. If your not using sendmail and your MTA cannot issue an error in this fashion, you do not want to mess around with this. What happens with autoresponders is that spammers inadvertantly trigger them. As a result the autoresponses get sent to thousands of victims who had their names forged to the spammers message. Some of those victim addresses are spamtrap addesses. With the result that if you setup an autoresponder and a spammer hits it, your site will get blacklisted. The Sendmail method does not have this problem because the error message is returned during the transmission phase, to the sending mailserver, it is not e-mailed to the envelope address. An autoresponder that only sends autoresponses to a defined list of senders is OK. But one that sends to anyone is a Bad Thing! Ted -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of James Csoka Sent: Friday, February 17, 2006 9:06 AM To: Dave; freebsd-questions@freebsd.org Subject: Re: sendmail autoresponder This isn't a sendmail solution, but I use openwebmail for my company's webmail interface, and it has an autoresponder option. It'll send back an email response, and you can simply set up filtering to dump the incoming mail to the trash folder. -jim - Original Message - From: Dave [EMAIL PROTECTED] To: freebsd-questions@freebsd.org Sent: Friday, February 17, 2006 11:24 AM Subject: sendmail autoresponder Hello, I've got a box that i took over that runs sendmail, mailscanner, and sa for antispam. There's an email address at one of the domains that the owner has indicated he would like an autoresponder hooked to it. THe objective is whenever someone sends to that address it won't be delivered to a mailbox, but dropped and the autoresponder msg will be sent back. I'm a sendmail newbie in the extreme and would appreciate any advice. Thanks. Dave. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.15.10/263 - Release Date: 2/16/2006 ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: sendmail autoresponder
On 2006-02-17 09:29, Ted Mittelstaedt [EMAIL PROTECTED] wrote: You do NOT want to setup an autoresponder like vacation! The FEATURE method that Giorgos explained is the correct way to do it. If your not using sendmail and your MTA cannot issue an error in this fashion, you do not want to mess around with this. What happens with autoresponders is that spammers inadvertantly trigger them. As a result the autoresponses get sent to thousands of victims who had their names forged to the spammers message. Some of those victim addresses are spamtrap addesses. Oh, crap! I hadn't thought of that. Good thinking there Ted :) ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: sendmail autoresponder
From: Giorgos Keramidas [EMAIL PROTECTED]
On 2006-02-17 09:29, Ted Mittelstaedt [EMAIL PROTECTED] wrote:
You do NOT want to setup an autoresponder like vacation! The
FEATURE method that Giorgos explained is the correct way to do it.
If your not using sendmail and your MTA cannot issue an error in
this fashion, you do not want to mess around with this.
What happens with autoresponders is that spammers inadvertantly
trigger them. As a result the autoresponses get sent to thousands of
victims who had their names forged to the spammers message. Some
of those victim addresses are spamtrap addesses.
Oh, crap! I hadn't thought of that. Good thinking there Ted :)
There is no inadvertantly about it. If spammers find an open relay
or an open bounce they exploit it. And you get blacklisted.
{o.o} Joanne
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RE: sendmail autoresponder
-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of jdow Sent: Friday, February 17, 2006 2:27 PM To: freebsd-questions@freebsd.org Subject: Re: sendmail autoresponder From: Giorgos Keramidas [EMAIL PROTECTED] On 2006-02-17 09:29, Ted Mittelstaedt [EMAIL PROTECTED] wrote: You do NOT want to setup an autoresponder like vacation! The FEATURE method that Giorgos explained is the correct way to do it. If your not using sendmail and your MTA cannot issue an error in this fashion, you do not want to mess around with this. What happens with autoresponders is that spammers inadvertantly trigger them. As a result the autoresponses get sent to thousands of victims who had their names forged to the spammers message. Some of those victim addresses are spamtrap addesses. Oh, crap! I hadn't thought of that. Good thinking there Ted :) There is no inadvertantly about it. If spammers find an open relay or an open bounce they exploit it. And you get blacklisted. But, in this case the server isn't relaying or bouncing the spam, it is spitting back the canned vacation or whatever message, which is probably not what the spammer wants. The spam is going into the hapless vacationers inbox. The problem is that the blacklist servers on the Internet can't tell the difference between real live spam in their dozen or so spamtraps, and someone's out of office e-mail message in their dozen or so spamtraps. The situation is of course compounded when people pull shenanigans like wildcarding every incoming message for a domain name into an autoresponder, this used to be common when people renamed domains. But even a normal spam run can do it. For example [EMAIL PROTECTED] goes on vacation. Spammer decides [EMAIL PROTECTED] would be a good name to forge on a spam. Spammer transmits spam and thousands of bounces and many complaints bounce back to [EMAIL PROTECTED] Sally's vacation program then spits out thousands of vacation notices to [EMAIL PROTECTED] etc. domains, plus hundreds of vacation notices to idiot people who were complaining to Sally because they didn't bother looking at the header of the initial spam and seeing that it came from some other machine than example.com. Those people get the vacation notice in response to their complaint to Sally to stop spamming them, which causes some of them to forward those to spamcop, which initiates a blacklist. The same issue applies to those click on my URL website to validate your e-mail message autoresponding things. Those get people blacklisted for the same reason. Ted ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
