Not receiving email

[MauriceW]

After a reboot the VPS does not receive any email anymore. All sent mails to this VPS are bounced with a message 550 Authentication required.

Any ideas?

 

[Active8]

backup first and:

cd /usr/local/directadmin/custombuild
./build update
./build exim
./build exim_conf
mv /etc/dovecot /etc/dovecot~moved 
./build dovecot
./build dovecot_conf

 

[MauriceW]

Interesting, what does it do? Are mailboxes deleted, so I have to re-add them again? Are other things deleted? MySQL? Files?

I have no idea what this does exactly, so I have to ask...

 

[Active8]

There will be nothing deleted, it just rebuilds your exim and dovecot

 

[Erulezz]

backup first and:

cd /usr/local/directadmin/custombuild
./build update
./build exim
./build exim_conf
mv /etc/dovecot /etc/dovecot~moved
./build dovecot
./build dovecot_conf

I would add after ./build update;

./build set eximconf_release 4.5

And then again ./build update. So it uses the latest config.

 

[MauriceW]

Just rebuilt exim and dovecot but the problem is still the same. All incoming messages are bounced.

It's as if DA doesn't recognize incoming emails. As if the domain is not on this VPS. (but it IS, and the MX record too)

It's as if the server thinks it must relay the incoming mail. Of course this isn't allowed.

 

[Active8]

DA box is setup to handle emails ? just an reboot don't make this error, something must happened before
Want to share the domain ?

 

[MauriceW]

Yes, DA box is certainly setup to handle emails. It DID work, but after a reboot, the problem occurred. All emails to all domains on this box are bounced. For example domain mynis.net. This domain has a catchall setup.

But no matter if you send to an existing or non-exisiting box. Everything is bounced.

 

[Active8]

Working behind Cloudflare i see, fast check lead me to this:
No CNAME in MX Records

WARNING: Found CNAMEs in MX records, invalid MX records:

• mail.mynis.net.

RFC 2181, section 10.3 says that host name must map directly to one or more address record (A or AAAA) and must not point to any CNAME records. RFC 1034, section 3.6.2 says if a name appears in the right-hand side of RR (Resource Record) it should not appear in the left-hand name of CNAME RR, thus CNAME records should not be used with NS and MX records. Despite this restrictions, there are many working configuration using CNAME with NS and MX records.

 

[MauriceW]

Oh really? Never knew this. I will change the CNAME record to an A record.
Edit. Have just changed it to an A record.

But does this explain why the box bounces everything? (still does)

 

[Active8]

maybe DNS propagation , does it work now ?

 

[MauriceW]

Nope, not working.

 

[Active8]

Try to test it without Cloudflare, maybe there is an collision with some settings

 

[MauriceW]

Yesterday, right after you suggested it, I've set the Cloudflare proxy for the mail A record to DNS only. So, they're not proxying but only resolving.

It'the following day now and the problem is the same. I think it is something on the box itself.

It treats all incoming e-mail as if they should not be delivered locally, but as if it should relay them.

 

[MauriceW]

Going to ditch this VPS.

I have it with Tilaa.com.

Apparently a terrible VPS config. Their service is also non-existent.

 

[Active8]

I can recommended Transip, not cheap but stable and goods VPS
They also provide VPS with DA included

 

[MauriceW]

Thanks for the suggestion. Will check 'm out...