Can't Send Mail from Smart Phone or Outlook

Bushytea · 12-10-2011, 09:05 PM

Hi,

I am running a server with Centos 5.2, Postfix 2.3.3 and Dovecot. The server is not on my local network so it is not behind my router.

I can send mail to/from the email account on the server. (Ex: Send mail from server account to aol account then send mail from aol account back to server account)

I can even see the mail that is in the users mailbox from my phone but I am not able to send. When I try to setup the account in Outlook or try to send mail from my phone they both say they are unable to connect to the smtp server. When I test the settings in Outlook it says that it logs in successfully but cannot connect to the smtp server. There are no errors in my maillog either but there are no signs that there was any attempt to connect either.I have searched and found tons of how-tos but just can not get it to work.

Maillog:

Quote:

Dec 10 21:03:26 sendmail[29858]: alias database /etc/aliases rebuilt by root
Dec 10 21:03:26 sendmail[29858]: /etc/aliases: 72 aliases, longest 10 bytes, 700 bytes total
Dec 10 21:03:27 postfix/postfix-script: starting the Postfix mail system
Dec 10 21:03:27 postfix/master[29904]: daemon started -- version 2.3.3, configuration /etc/postfix
Dec 10 21:03:28 postfix/postfix-script: stopping the Postfix mail system
Dec 10 21:03:28 postfix/master[29904]: terminating on signal 15
Dec 10 21:03:28 sendmail[29921]: alias database /etc/aliases rebuilt by root
Dec 10 21:03:28 sendmail[29921]: /etc/aliases: 72 aliases, longest 10 bytes, 700 bytes total
Dec 10 21:03:28 postfix/postfix-script: starting the Postfix mail system
Dec 10 21:03:28 postfix/master[29967]: daemon started -- version 2.3.3, configuration /etc/postfix

Results from telnet mail.domain.com 25 is:

Quote:

ehlo host
250-mail.domain.com
250-PIPELINING
250-SIZE 10240000
250-ETRN
250-AUTH PLAIN LOGIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN

Here is part of my main.cf from posfix:

Quote:

myhostname = mail.domain.com
mydomain = domain.com
myorigin = $mydomain
inet_interfaces = all
mydestination = $myhostname, localhost.$mydomain, $mydomain
mynetworks = 127.0.0.0/8 168.100.189.2/32
alias_maps = hash:/etc/aliases
#
smtpd_recipient_restrictions = permit_mynetworks permit_sasl_authenticated reject_unauth_destination reject_invalid_hostname reject_non_fqdn_hostname reject_non_fqdn_sender reject_non_fqdn_recipient reject_unknown_sender_domain reject_unknown_recipient_domain reject_rbl_client zen.spamhaus.org permit
smtpd_helo_required = yes
disable_vrfy_command = yes
smtpd_delay_reject = no

# SASL Authentication
smtpd_sasl_auth_enable = yes
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth

Then here is my dovecot.conf

Quote:

protocols = imap pop3
listen = *
disable_plaintext_auth = no
pop3_uidl_format = %08Xu%08Xv
mechanisms = plain login
client {
path = /var/spool/postfix/private/auth
mode = 0660
user = postfix
group = postfix
}

Thanks!

lithos · 12-11-2011, 05:18 PM

Code:

smtpd_recipient_restrictions = permit_mynetworks permit_sasl_authenticated reject_unauth_destination reject_invalid_hostname reject_non_fqdn_hostname reject_non_fqdn_sender reject_non_fqdn_recipient reject_unknown_sender_domain reject_unknown_recipient_domain reject_rbl_client zen.spamhaus.org

this line is somewhere not allowing you to "relay" the messages (emails) you want to send.
I don't know exactly which, but if misconfigured, then you became an open relay for spammers (which in this case your Postfix treats you).

Quote:

Results from telnet mail.domain.com 25 is:

Code:

ehlo host
250-mail.domain.com
250-PIPELINING
250-SIZE 10240000
250-ETRN
250-AUTH PLAIN LOGIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN

I would try more than just this Telnet login,
try to send some real message and see the Log and output why it doesn't:

Code:

telnet yourserverdomain.net 25
250-mail.domain.com
EHLO FQDN server name or something
250-PIPELINING
250-SIZE 10240000
250-ETRN
250-AUTH PLAIN LOGIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN 
mail from: some_your_email@address.com
250 2.1.0 Ok
rcpt to: doesnt@example.com  <--- try your real email address for test
554 5.7.1 <doesnt_exist@example.com>: Relay access denied

Now you get a "Relay access denied" message from your server which points to restrictions in the line stated at beginning.

good luck

Bushytea · 12-19-2011, 01:42 PM

Well I made some progress today on this issue but still need some help/advice.

I changed the below line from

Quote:

myhostname = mail.domain.com

to

Quote:

myhostname = domain.com

I also changed the line

Quote:

mynetworks = 127.0.0.0/8 168.100.189.2/32

to

Quote:

mynetworks_style = subnet

Now I have been able to send email from my phone to an AOL email account successfully. However when I try to setup an account in Outlook it keeps giving me the error below.

Quote:

Send test e-mail message: Outlook cannot connect to your outgoing (SMTP) e-mail server. If you continue to receive this message, contact your server administrator or Internet service provider (ISP).

What would allow my phone to work now but not allow outlook to connect?

Thanks

lithos · 12-20-2011, 05:58 AM

Your DOVECOT port 110 for POP3 access might be inaccessible. Probably you don't have it running or blocked by firewall not to allow incoming connections on port 110.

Quote:

myhostname = domain.com

can be configured as written in Postfix configuration

under section
My own hostname near bottom end of page.