On 12/09/13 23:04, Timothy Murphy wrote: > Carl T. Miller wrote: > >> I'd be surprised if anything in that document is not >> right. If you find anything or you need assistance, >> the list is here. > > I didn't find anything wrong in the document in question > (http://wiki.centos.org/HowTos/postfix), > except that a couple of packages mentioned > (ystem-change-mail*) don't seem to exist in CentOS-6. > That was for switching the default MTA in EL5. As Postfix is already the default in EL6 it is simply not needed. > However, if my experience is anything to go by, > it missed out two essential points. > > Firstly, after following the instructions meticulously, > I found that I could not send out mail > because (according to /var/log/maillog) > the From address was tim at localhost.localdomain , > and this was rejected by the recipient host > or rather his ISP. > ------------------------------- > <tim at localhost.localdomain> MAIL FROM domain does not exist > (in reply to MAIL FROM command) > ------------------------------- > I cured this by adding > tim tim at gayleard.eu > to /etc/hosts . > I don't know if this is the best way to go about it? > This is typically caused by having your hostname set to localhost (or loaclhost.localdomain). Your hostname should reflect your fqdn. > After correcting this, I found my email was still rejected, > with the message "Blacklisted by Spamhaus"! > I read in <http://www.spamhaus.org/pbl/query/PBL814205> > that 'the reason is simply that you need to turn on "SMTP Authentication"' > The bit at the top of the Spamhaus link says it all really - as a matter of *policy*, Spamhaus and/or your ISP has decided that you shouldn't be sending email direct from that IP address as it's residential / dynamic / whatever. Either way, as a result 90% of the internet is going to reject your mail. You will need to relay all outbound email through your ISPs smarthost to achieve any sort of deliverability.