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Here's what I'm trying to do: I own a domain, entropics.net, and I want to be able to send and receive e-mail from @entropics.net addresses. I've got the DNS server set up with the MX record and all that, and everything else (HTTP, FTP, ssh, etc) works fine.
I can receive e-mail without any problems. For instance, if I send an e-mail from my yahoo account to my @entropics.net account, it shows up right away. However, sending mail is a bit of a problem. When I send mail to my yahoo address, it does appear, but it's in the Bulk Mail folder. Upon closer examination of the e-mail headers, it appears that the From field is empty (although everything else seems to be in order).
What could cause something like this? I was under the impression that postfix would construct the From header by appending the myorigin variable in main.cf to the local username (separated by an @, naturally). myorigin is set to $mydomain, which is set to entropics.net.
Any thoughts? Could this be a problem with my e-mail program (mutt) instead of postfix? I looked over the Muttrc file in /etc/mutt, but I didn't find anything mentioning any kind of e-mail headers.
Thanks in advance for the help. If anyone would like to see my main.cf file, I can post that as well.
P.S. The next step is an IMAP server (or POP3). Can anyone tell me which protocol is best in terms of security and ease of configuration? More specifically, which server is best in terms of security and ease of configuration? I played around a bit with cyrus-imapd, but that seems to be pretty complicated and I couldn't get it to work. I'm compiling courier-imap as I right this; if anyone has some tips on how to set that up with postfix, I'd love to hear them.