Jorg Ancrath asked:
I built my own mail server using postfix/dovecot in CentOS 6, this is my postconf -n results:
alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases command_directory = /usr/sbin config_directory = /etc/postfix daemon_directory = /usr/libexec/postfix data_directory = /var/lib/postfix debug_peer_level = 2 home_mailbox = Maildir/ html_directory = no inet_interfaces = localhost inet_protocols = all mail_owner = postfix mailq_path = /usr/bin/mailq.postfix manpage_directory = /usr/share/man mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain mydomain = example.com myhostname = mail.example.com mynetworks = 126.96.36.199/28, 127.0.0.0/8 myorigin = $mydomain newaliases_path = /usr/bin/newaliases.postfix queue_directory = /var/spool/postfix readme_directory = /usr/share/doc/postfix-2.6.6/README_FILES relay_domains = sample_directory = /usr/share/doc/postfix-2.6.6/samples sendmail_path = /usr/sbin/sendmail.postfix setgid_group = postdrop unknown_local_recipient_reject_code = 550
I’ve tried using telnet to test my emails and I do get them in the /home/user/Maildir/new folder.
I assume everything is OK with the mail server, so I went ahead and added MX records to my DNS settings.
This is the first time I’ve used Cloudflare’s free DNS service, and I admit to not being the most knowledgeable person when it comes to this, but I added a couple of records in there:
- MX – @ => mail.example.com
- A – mail.example.com => My VPS ip (where the mail server is located)
The MX record seems to be in place, a quick “dig MX example.com” does wield a result. The problem now is… even though I created the record as mail.example.com, the actual entry as seen via dig is dc-8c1937cd-mail.example.com., a string seems to have been appended to the DNS record.
I’ve since tried sending email from an outside source (not telnet) without success. Do I need to reconfigure postfix and set myhostname as dc-8c1937cd-mail.example.com.? Am I missing something here in the grander scheme of DNS or is this just the way Cloudflare operates? Could my mailserver not be configured correctly? (logs from my telnet tests look fine)
In the CloudFlare DNS settings, make sure that you have a “gray” cloud for the
Beyond that, your DNS seems to be in a workable configuration, and you are (by your own admission) receiving mail successfully.
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