Can't send emails with msmtp - domain name conflict

[acampbell]

My domain name is xxxxx.org.uk and my machine is mybox.
I therefore put mybox.xxxx.xxx.xxx in /etc/myname.

my mail is sent by msmtp. This puts mybox.xxxxx.xxx.xxx as the sender which my isp's server rejects.

if I change myname to xxxxx.xxx.xxx, without mybox, the mail is ok but my machine has no name.

over the last 2 days i've fiddled endlessly with .msmtprc and /etc/hosts and googled whatever i can think of without improvement. Can anyone suggest a way to send emails while preserving my machine name?

[jggimi]

Hello, and welcome!

First, you may want to edit your initial post and redact your personally identifiable information. But, since you provided it, I'm able to see that your local computer "ithaca," when using your fully qualified domain name -- is not resolvable by an authoritative server on the Internet's Domain Name System (DNS). Because it isn't resolvable, that machine cannot be found on the Internet, and its responsible mailserver cannot be identified -- since there is no record of the domain, it doesn't have any MX mailserver records.

To see every type of DNS record for the higher level domain name's records, which do exist, remove "ithaca." from the front of the domain name and use:

$ dig <domain name> ANY

The MX record reports the mailserver used to email users @<domain name>. Note also, the reported status is "NOERROR" -- no errors during the query.

If you are using your ISP's nameservers, or other external nameservers, try the command, this time adding "ithaca." in front of your domain name. The response will show which nameservers at your ISP are authoritative, and the reported status will be "NXDOMAIN" - domain name not found. You'll also note, no MX record, since no records at all are available.

[acampbell]

Many thanks for your reply. I do understand why the mail wasn't going out; the question was how to change the domain name of the mail to the correct format, without the machine name.

I eventually found a solution: I modified my mutt config to make mutt insert the correct header. This works ok.

I still don't understand why obsd insists on adding the machine name to the domain name. Linux doesn't do this. I tried making /etc/defaultdomain but no improvement.

[TronDD]

I didn't pipe up because I don't know msmtp and its always annoying when someone's solution is "use something else that I like" but...

I've been messing with email myself and found openSMTPD to be dead simple. You can solve this issue with a simple "relay ... as @hostname" or "relay ... as user@hostname" and it rewrites the message header with the desired hostname.

I'm using multiple email accounts with multiple SMTP servers relaying through the local openSMTPD.

Tim.

[jggimi]

Originally Posted by TronDD

...I don't know msmtp...

Neither do I.

Originally Posted by acampbell

Linux doesn't do this.

True. OpenBSD isn't Linux, and how it accomplishes tasks is often quite different from what you're used to.

You didn't mention what version of OpenBSD you're running. At 5.6, OpenBSD switched from Sendmail to OpenSMTPd as its default MTA. If you're using the default MTA, and you're using 5.6, the configuration file TronDD mentions in his post will be /etc/mail/smtpd.conf and its applicable man page is smtpd.conf(5). If you're running an earlier -release and using the default MTA Sendmail, see /etc/mail/README for Sendmail configuration guidance.

[acampbell]

I'm using 5.6. I'll look into openSMTP but probably after my broken right wrist has healed and my typing can use more than one left finger!

Actually everything is fine now that I'm using mutt to configure outgoing mail correctly.