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postal-0.71.tgz – rewrote the md5 checking code and fixed lots of little bugs.postal-0.72.tgz – made LMTP work and accept TAB as a field delimiter.Fixed a nasty bug with tab separated fields. postal-0.73.tgz – Make postal correctly issue the quit command after delivery failure.Add -b option to bind to an address to bhm. postal-0.75.tgz – Fix some compiler warnings.postal-0.76.tgz – #define PATH_MAX if it’s not already defined, for HURD.

#Postal 3 download pc how to#

This may mean just including documentation on how to simulate the use patterns of a mail server using someone else’s DNS benchmark, but may mean writing my own DNS benchmark. Determining a solution to the problem of benchmarking DNS servers.Making BHM simulate the more common anti-spam measures that are in use to determine the impact that they have on list servers.Support for simulating slow servers in Postal and BHM (probably reducing TCP window size and delaying read() calls).This needs to support at least 2^24 addresses so it is entirely impractical to have so many IP addresses permanently assigned to the test machine. Support for simulating large numbers of source addresses in Postal.Matching email sent by Postal and mail received by BHM and Rabid to ensure that each message is delivered correctly (no repeats and no corruption).I will not release a 1.0 version until the following features are implemented:

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Also if you want to run performance analysis software to determine what the bottlenecks are on your mail server then you could set Postal and Rabid to only use half the maximum speed (so the CPU and disk usage of the analysis software won’t impact on the mail server). This should make it easy to determine the amount of system resources that are used by a particular volume of traffic. This means that you can specify that these programs send a specific number of messages and perform a specific number of POP connections per minute respectively. I have added rate limiting support in Rabid and Postal. Rabid now checks the MD5 checksum and displays error messages when it doesn’t match. Postal now adds a MD5 checksum in the header X-PostalHash to all messages it sends (checksum is over the Subject, Date, Message-ID, From, and To headers and the message body including the “\r\n” that ends each line of text in the SMTP protocol).

Rabid is the mad Biff, it is a POP benchmark. Postal-list will list all the possible expansions for anĪccount name (used for creating a list of accounts to create on your test server). I have now added two new programs to the suite, postal-list, and rabid.

A header field X-Postal will be used so that procmail can easily filter out such email just in case you accidentally put your own email address as one of the test addresses. When sending the mail the subject and body will be random data. Since that time the RAM size in commodity machines has increased far faster than the size of ISP mail servers so I removed the template feature (which seemed to confuse many people). I originally used a template to generate the list of users because if each email address takes 30 bytes of storage then 3,000,000 accounts would take 90M of RAM which would be more than the memory in the test machine I was using at the time. It works by taking a list of email addresses to use as FROM and TO addresses. Please use the comments section for bug reports and feature requests. This post (which will be updated periodically) will be the main reference page for the software. I have a Postal category on my main blog that I use for a variety of news related to Postal. I have decided to release it under the GPL because there is no benefit in keeping the source secret, and the world needs to know which mail servers perform well and which don’t!Īt the OSDC conference in 2006 I presented a paper on mail relay performance based on the new BHM program that is now part of Postal. I started work on this because I need to know which mail server will give the best performance with more than 1,000,000 users. This is a program I wrote to benchmark SMTP servers.