POP3 - can't login with user@domain.com - but with user.domain is ok?

[flameproof]

I have a virtual server with 3 domains on it sharing the same VPS IP. I use Webmin/Virtualmin to manage it.

I have 2 problems: mx.domain3.com does not work. I get "invalid host" when trying pop3 login. But I can pop3 login to domain3.com as user.domain3

There is also no DNS record for mx.domain3.com. Domain 1 + 2 have. How to set that mx.domain3.com ?

Domain 1 and 2 work, but:

I can not pop3 login with user@domain#.com but with user.domain# it works. Same for telnet login.

I presume it's Postfix related, but so far no luck fixing it. What can I do next?

[falko]

I have a virtual server with 3 domains on it sharing the same VPS IP. I use Webmin/Virtualmin to manage it.

I have 2 problems: mx.domain3.com does not work. I get "invalid host" when trying pop3 login. But I can pop3 login to domain3.com as user.domain3

There is also no DNS record for mx.domain3.com. Domain 1 + 2 have. How to set that mx.domain3.com ?You must create an A record for mx.domain3.com. To do this, you have to find out the authoritative nameservers:
dig ns domain3.com
(maybe these are the nameservers of your domain registrar? If that is the case, then you can create the DNS record in the registrar's web interface.)

Domain 1 and 2 work, but:

I can not pop3 login with user@domain#.com but with user.domain# it works. Same for telnet login.

I presume it's Postfix related, but so far no luck fixing it. What can I do next?What POP3/IMAP server are you using?

[chipsafts]

what does

dig MX domainx.com

show for each domain ?

[flameproof]

You must create an A record for mx.domain3.com. To do this, you have to find out the authoritative nameservers:
dig ns domain3.com
(maybe these are the nameservers of your domain registrar? If that is the case, then you can create the DNS record in the registrar's web interface.)

What POP3/IMAP server are you using?

dig ns domain3.com

;; QUESTION SECTION:
;domain3.com. IN NS

;; ANSWER SECTION:
domain3.com. 173 IN NS dns2.host.com.
domain3.com. 173 IN NS dns1.host.com.



and dig MX.....





dig mx domain3.com
;; QUESTION SECTION:
;domain3.com. IN MX

;; ANSWER SECTION:
domain3.com. 3600 IN MX 10 mx.domain3.com.
domain3.com. 3600 IN MX 10 domain3.com.


I use Dovecot for POP/IMAP

For domain3 pop3 login from client does not work at all now. It can receive mail. mail.domain3.com and mx.domain3.com give me a invalid host! - domain3.com gives me error: authentications failed

For domain1 and domain2 web works fine, howver I have a NS mismatch between my VPS and the registrar and fix that new. But domain 3 matches. There seem to be an underlying error somewhere else, maybe Webmin related.

Ok, for domain1 I get with dig mx:


;; ANSWER SECTION:
domain1.com. 300 IN MX 0 domain1.com.

[falko]

You must create an A record for mx.domain3.com on dns1.host.com and dns2.host.com. These are probably the nameservers of your registrar... ?


I use Dovecot for POP/IMAP

What's in your dovecot.conf?

[flameproof]

I had a few out days, just back from the land of Oz (Gee what a place!!!)

That login "problem" is solve. VIrtualmin sets it up in that way. It's ok then. Next... still get errors when I login.

You must create an A record for mx.domain3.com on dns1.host.com and dns2.host.com. These are probably the nameservers of your registrar... ?

I presume with no A record I should get "invalid host". I am nor sure what and how to set. Here's what I got:

A domain1.com. Shared.IP.# 3600 Manual Active
CNAME www.domain1.com. domain1.com. 3600 Manual Active
MX domain1.com. 10 domain1.com.

A domain2.com.hk. Shared.IP.# 3600 Manual Active
CNAME www.domain2.com.hk. domain2.com.hk. 3600 Manual Active
MX domain2.com.hk. 10 mx1.myhost.com.

A domain3.com. Shared.IP.# 3600 Manual Active
A mail.domain3.com. Shared.IP.# 3600 Manual Active
A mx.domain3.com. Shared.IP.# 3600 Manual Active
CNAME www.domain3.com. domain3.com. 3600 Manual Active
MX domain3.com. 10 mx.domain3.com. 3600 Manual Active
MX domain3.com. 10 domain3.com. 3600 Manual Active


It looks a little messed up as I was playing around with it...

When I do a POP3 mailcheck I get:

domain1.com - ok
mx.domain1.com - invalid host!
domain2.com.hk - ok
mx.domain2.com.hk - ok
domain3.com - error: authentication failed
mx.domain3.com - error: authentication failed

What's in your dovecot.conf?

I deleted all #.... entries:

protocols = imap imaps pop3 pop3s
mail_location = maildir:~/Maildir
protocol imap {
}
protocol pop3 {
pop3_uidl_format = %08Xu%08Xv
}
protocol lda {
}
auth default {
}
dict {
}
plugin {
}


And here is postfix....:



queue_directory = /var/spool/postfix
command_directory = /usr/sbin
daemon_directory = /usr/libexec/postfix
mail_owner = postfix
inet_interfaces = all
mydestination = $myhostname, localhost.$mydomain, localhost, my_vps_host.com
unknown_local_recipient_reject_code = 550
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
debug_peer_level = 2
debugger_command =
sendmail_path = /usr/sbin/sendmail.postfix
newaliases_path = /usr/bin/newaliases.postfix
mailq_path = /usr/bin/mailq.postfix
setgid_group = postdrop
html_directory = no
manpage_directory = /usr/share/man
sample_directory = /usr/share/doc/postfix-2.3.3/samples
readme_directory = /usr/share/doc/postfix-2.3.3/README_FILES
sender_bcc_maps = hash:/etc/postfix/bcc
mailbox_command = /usr/bin/procmail-wrapper -o -a $DOMAIN -d $LOGNAME
home_mailbox = Maildir/
smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
broken_sasl_auth_clients = yes
smtpd_recipient_restrictions = permit_mynetworks permit_sasl_authenticated reject_unauth_destination
virtual_alias_maps = hash:/etc/postfix/virtual


I presume there are plenty of errors. Any hint is welcome!


Update:
Problems with the A record are fixed now. MX is working. Everything fine. Ready for action!