Date: Sun, 07 Aug 2016 20:10:04 +0200 From: =?UTF-8?Q?Sol=C3=A8ne_Rapenne?= <solene@perso.pw> To: freebsd-questions@freebsd.org Cc: owner-freebsd-questions@freebsd.org Subject: Re: Need advice for setting up mail server Message-ID: <eb9f0a6ac276fe69cffc8bd31dd699ba@mail.zplay.eu> In-Reply-To: <20160807180149.GC12411@len-t420.klaas> References: <VI1PR02MB0974A0FB1361638BDD437043F61A0@VI1PR02MB0974.eurprd02.prod.outlook.com> <2394887a809b4ad8e702d1d13bb1337c@mail.zplay.eu> <20160807180149.GC12411@len-t420.klaas>
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Le 2016-08-07 20:01, Niklaas Baudet von Gersdorff a écrit : > Solène Rapenne [2016-08-07 19:16 +0200] : > >> Hello, you will need a SMTP server like Postfix or OpenSMTPD. >> You will also need to care with DKIM signing and SPF in your >> DNS. By running your own mail server you may also have problems >> to send mails to big companies like gmail, hotmail, yahoo >> etc... because they tend to blacklist large range of IP and >> it's hard to get removed on this list. > > At this stage I neither have SPF nor DKIM implemented on one of > my machines (this one I am actually sending you the mail from) > and so far I had no problems sending mails to "bigger companies". > I realised that Google started automatically guessing SPF and it > works for my mail server at least. :-) I have had issues with SPF since last year for a lot of servers (not necessaries one of big companies) and I have been rejected recently of some servers because I wasn't using DKIM. Even if it works without them, you need to be aware of their existence in case you are rejected. >> Later you may need to fight against spam with greylisting and >> spamassassin. > > While greylisting is quite effective I had problems with it > because "bigger companies" tend to send mail from different mail > server i.e., greylisting won't work that well. I used > spamassassin years ago and was not very happy with it because > from my feeling it uses a lot of resources but still has > difficulties marking spam properly. This is a problem with greylisting but this could be "fixed" with a script running every minute whitelisting servers of known domains checked by reverse dns resolving. It will still add delay because the server need to retry the sending but it works.
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