Re: Which mail server?
On Fri, Feb 24, 2006 at 07:44:18PM +0800, Shane Chrisp wrote:
> On Fri, 2006-02-24 at 11:00 +0000, Cameron L. Spitzer wrote:
> > > Is qmail is good enough or do I have to choose postfix or exim? Which
> > > one and why?
> > Qmail's got two problems that were enough for me to
> > replace it.
> > 1. It doesn't know how to reject anything in the SMTP
> > cycle. It swallows everything and then barfs up the crap.
> > Generates a lot of backscatter. So much that you can get
> > blocked by AOL if some spammer spoofs them a lot.
> This is not quite true. There is patches and helper programs which do
> reject at the smtp level. Using ucspi-tcp allows the blocking of
> messages at the smtp conversation, and then combined with simscan you
> can also do filtering of spam and viruses and drop them at the smtp
> conversation level as well.
Right - so qmail needs patching to make it usable...
> > 2. It doesn't know how to bunch together multiple
> > recipients of the same message in the same domain.
> > So if you have 500 Yahoo subscribers on a mailing list,
> > it takes 500 separate processes and SMTP transactions
> > to deliver them. Yahoo will block you for that.
> > Postfix will collect them together and do one
> > SMTP transaction.
> Though im not 100% certain on this one, I am fairly certain there is a
> patch for this as well.
And patching a lot ;)
I tend to stick with exim4 these days - it lets me do things the way
that I expect them to, and make complex mailsetups a lot more bareable.