Can anybody name a few disadvantages of Greylisting? I know it is a very useful feature, but would like to know if there are also major disadvantages before I can proceed with the implementation.
View 6 Replieswanna ask you about vps company called modvps
what is the advantages and disadvantages of this company?
I've been leaning toward going with WestHost for a medium-sized project. They offer VPS without root access, though, and much of the advice in the "HOW TO: Secure and Optimize your VPS" thread requires running commands as root.
My experience has all been with colocating my own servers in a data center, with everything accessible when I log in as root (though of course I ordinarily logged in as a normal user instead). This was three or four years ago, and a lot has changed since then.
Can someone who's up on this stuff please describe the pros and cons of non-root VPS service such as WestHost provides? Cost seems to be one advantage :-} and I imagine it's wise for inexpert Webmasters not to have a completely wide-open system. Are there other pluses to non-root VPS that aren't as obvious?
Most importantly, what kind of operations will I not be able to carry out if I go with WestHost or a similar non-root VPS host? Can I reasonably expect the hosting service to perform the kind of locking-down described in WHT's tutorial on VPS security?
I'll be asking similar questions of WestHost's support people but thought it would be a good idea to ask people without a stake in either the root-access or the non-root way of doing things.
I've started having problems with a site I'm hosting always having their e-mail bounce back as "greylisted." They do not spam (I can vouch for that) and as far as I can tell, we are not on any RBLs. If I understand right, only one e-mail should bounce with greylisting, but some domains have remained unroutable time after time. This did not happen at all until just recently, which makes me think we must have ended up on some list somewhere.
Any ideas what might be causing this? I'm starting to worry we won't be able to e-mail out to anybody soon, and I'm not sure why!
My IP is 69.93.217.50.
Suddenly my server stop to accept mail from outside. Here you have the logs of mail.info
Feb 20 14:26:02 xxx postfix/smtpd[5581]: 17098E1CCB: milter-reject: DATA from mail2.email-o-matic.com[217.116.24.xxx]: 451 4.7.1 Service unavailable - try again later; from=<empresas@xxx.es> to=<whatever@whatwever.es> proto=ESMTP helo=<mail2.email-o-matic.com>
It seems it is a milter problem as in the line I can read "milter-reject"
Also I have a lot of lines like this:
Feb 20 14:27:34 dv2 greylisting filter[9152]: Starting greylisting filter...
Feb 20 14:27:36 dv2 greylisting filter[9154]: Starting greylisting filter...
Feb 20 14:27:37 dv2 greylisting filter[9165]: Starting greylisting filter...
I can go to control panel and stop plesk milter but I see these lines on mail.info
Feb 20 14:30:04 xxx postfix/smtpd[8845]: warning: connect to Milter service inet:127.0.0.1:12768: Connection refused
And 4.7.1 still there
Feb 20 14:30:03 xxx postfix/smtpd[7289]: NOQUEUE: milter-reject: CONNECT from 223.179.15.xx.dynamic.jazztel.es[37.15.179.xx]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
Maybe is a port (12768) connection error? How I can test that port?
This KB article does not solve anything as the load of the server is 0.1-0.5 [URL] ....
A temporal fix is to edit /etc/postfix/main.cf file comment these two lines:
smtpd_milters = , inet:127.0.0.1:12768
non_smtpd_milters = , inet:127.0.0.1:12768
And restart postfix (/etc/init.d/postfix restart)
I have a question regarding greylisting.
I activated greylisting on my mailserver and took a look in the logfiles.
The mail are temporary rejected with the following log message / statuscode:
451 4.7.1 Service unavailable - try again later;
Mails from my server to other servers are greylisted with messages like:
451 4.7.1 message delayed, see http://www.greylisting.org ;
452 Greylisted. Please try again after some time.
451 4.7.1 <E-MAIL-ADRESSE>: Sender address rejected: Greylisting in action. Please try again later.
Is it possible to change this log message at my server?
Seems this started when upgrading to a version of 12. It was working a few days ago and only seems to affect mailing lists. I found a google Cached thread here where Igor was assisting some folks as late as Aug 4 and referenced this was "reported to development (PPP-10678 for your reference)" it seems the forums on Parallels changed or something because several Google links are not working and resulting in having to used cached results for the two links below.
I am able to disable SPF and the e-mails go through just fine however this was working with SPF enabled before a recent upgrade.
Page 1
[URL] ....
Page 2
[URL] ....
This is the error message displayed in /var/log/maillog
Sep 24 01:38:35 controlpanel postfix/smtpd[3725]: connect from localhost[127.0.0.1]
Sep 24 01:38:35 controlpanel postfix/smtpd[3725]: D565017C013E: client=localhost[127.0.0.1]
Sep 24 01:38:35 controlpanel greylisting filter[3899]: Starting greylisting filter...
[Code] ....