Greylisting enabled in an effort to reduce spam
Samat -
Tuesday, August 30, 2005 - 18:27
Tags: Announcement
Greylisting has been enabled on Nabla Design’s e-mail servers.
We’re closely monitoring how this affects our e-mail services. Hopefully it will reduce the spam our customers receive immensely.
Issues with a.ns.nabladesign.com and DNS on caligula
One of the (supposedly) routine upgrades today rendered the DNS services on caligula inoperable, including:
- resolution of DNS names
- operation of the authoritative DNS server a.ns.nabladesign.com
Issue 1 prompted discovery of this problem. Issue 2 was not a major problem as Nabla Design’s DNS servers b.ns.nabladesign.com and c.ns.nabladesign.com continued to answer authorative requests without problem.
Service is now restored.
More on spam filtering: SPF disabled, greylisting probationary
Samat -
Friday, August 12, 2005 - 00:40
Tags: Announcement
After some concerns voiced by clients we’ve disable the SMTPd implementation of SPF, and will probably do so until it is more mainstream and less controversal. It however is still available as a SpamAssassin rule whose score can be configured.
Also after some concerns about greylisting, we’ve decided to run it in a “training” period to minimize downtime. After we believe training has been sufficient and we’ve received no complaints it will be turned on in full.
More aggressive spam filtering
Samat -
Thursday, August 11, 2005 - 23:09
Tags: Announcement
There have been many changes made to Nabla Design’s main e-mail server tonight to reduce the already small amount of spam our customers get. Some of these measures include:
- SMTPd-side RBL checking against fairly conservative RBLs: previously we were relying on SpamAssasin’s RBL checking only
- HELO filtering
- Greylisting
- Sender Policy Framework checking
Our setup so far has been running without problems. If you do encounter a problem please contact our technical support.