Exim4 smarthost conf

[rudu]

Hi,

I'm at a lost here trying to configure exim4 on a laptop running
bookworm as a smarthost relay to my email provider.
I already made it working on my desktop machine (bookworm also) on the
same local network though I had difficulties too at the time.
All I'm trying to do is to send myself a mail in a terminal.

To make it quick and with the help of the config files I found on my
desktop, I did :

# dpkg-reconfigure exim4-config    # smtpauth.provider.fr::465
# vi /etc/exim4/passwd.client    # putting the credentials here
# vi /etc/exim4/exim4.conf.localmacros    # MAIN_TLS_ENABLE = 1
# /usr/share/doc/exim4/examples/exim-gencert    # generating exim.crt
and exim.key files in /etc/exim4/
# update-exim4.conf
# systemctl restart exim4
$ echo "exim4 test" | mail -s "exim4 test" m...@mydomain.com

Then tail /var/log/exim4/mainlog shows invariably :

2022-07-19 17:16:22 1oDoHK-0000ta-0W H=provider.fr [109.234.xxx.xxx]:
Remote host closed connection in response to initial connection
2022-07-19 17:16:22 1oDoHK-0000ta-0W == m...@mydomain.com R=smarthost
T=remote_smtp_smarthost defer (-18) H=provider.fr [109.234.xxx.xxx]:
Remote host closed connection in response to initial connection
2022-07-19 17:16:22 End queue run: pid=4692 -qff

I have a doubt concerning the generation of the TLS files, I didn't know
what to answer to some questions (what domain name should I choose for
my local network for example ?) and I may have not given the same
answers at the time I got it working on my desktop.

So if this rings a bell for anybody, I would welcome any hint to track
down what's wrong here.

TIA
Rudu

[Tixy]

On Tue, 2022-07-19 at 17:37 +0200, rudu wrote:
> Hi,
>
> I'm at a lost here trying to configure exim4 on a laptop running
> bookworm as a smarthost relay to my email provider.
> I already made it working on my desktop machine (bookworm also) on the
> same local network though I had difficulties too at the time.
> All I'm trying to do is to send myself a mail in a terminal.
>
> To make it quick and with the help of the config files I found on my
> desktop, I did :
>
> # dpkg-reconfigure exim4-config    # smtpauth.provider.fr::465

Do you definitely need port 465, not 587?

> # vi /etc/exim4/passwd.client    # putting the credentials here

The steps below aren't something I've needed to do

> # vi /etc/exim4/exim4.conf.localmacros    # MAIN_TLS_ENABLE = 1
> # /usr/share/doc/exim4/examples/exim-gencert    # generating exim.crt
> and exim.key files in /etc/exim4/

My notes for the steps I did when setting up exim are...

Install exim4, ca-certificates and s-nail.

Run 'dpkg-reconfigure exim4-config' and answer questions...

General type of mail configuration: "mail sent by smarthost; received via SMTP or fetchmail"
System mail name: "yxit.co.uk"
IP-addresses to listen on for incoming SMTP connections: ""
Other destinations for which mail is accepted: "home"
Machines to relay mail for: "192.168.0.0/22"
IP address or host name of the outgoing smarthost: "mail.myisp.co.uk::587"
Hide local mail name: "Yes"
Visible domain name for local users: "yxit.co.uk"
Keep number of DNS-queries minimal (Dial-on-Demand)? "No"
Delivery method for local mail: "Maildir format in home directory"
Split configuration into small files?: "Yes"

Edit /etc/exim4/passwd.client to add

mail.myisp.co.uk:use...@myisp.co.uk:password

--
Tixy

[rudu]

Thank you Tixy.

Le 19/07/2022 à 20:26, Tixy a écrit :
> On Tue, 2022-07-19 at 17:37 +0200, rudu wrote:
>> Hi,
>>
>> I'm at a lost here trying to configure exim4 on a laptop running
>> bookworm as a smarthost relay to my email provider.
>> I already made it working on my desktop machine (bookworm also) on the
>> same local network though I had difficulties too at the time.
>> All I'm trying to do is to send myself a mail in a terminal.
>>
>> To make it quick and with the help of the config files I found on my
>> desktop, I did :
>>
>> # dpkg-reconfigure exim4-config    # smtpauth.provider.fr::465
> Do you definitely need port 465, not 587?

Just my provider's recommendations.
And my desktop uses them just fine.

>
>> # vi /etc/exim4/passwd.client    # putting the credentials here
> The steps below aren't something I've needed to do
>
>> # vi /etc/exim4/exim4.conf.localmacros    # MAIN_TLS_ENABLE = 1
>> # /usr/share/doc/exim4/examples/exim-gencert    # generating exim.crt
>> and exim.key files in /etc/exim4/
> My notes for the steps I did when setting up exim are...
>
> Install exim4, ca-certificates and s-nail.
>
> Run 'dpkg-reconfigure exim4-config' and answer questions...
>
> General type of mail configuration: "mail sent by smarthost; received via SMTP or fetchmail"
> System mail name: "yxit.co.uk"
> IP-addresses to listen on for incoming SMTP connections: ""
> Other destinations for which mail is accepted: "home"
> Machines to relay mail for: "192.168.0.0/22"
> IP address or host name of the outgoing smarthost: "mail.myisp.co.uk::587"
> Hide local mail name: "Yes"
> Visible domain name for local users: "yxit.co.uk"
> Keep number of DNS-queries minimal (Dial-on-Demand)? "No"
> Delivery method for local mail: "Maildir format in home directory"
> Split configuration into small files?: "Yes"
>
> Edit /etc/exim4/passwd.client to add
>
> mail.myisp.co.uk:use...@myisp.co.uk:password

My general type of exim4 configuration is "satellite" as I just intend
to relay the outgoing mails to my provider.
Here is my config files :
# cat /etc/exim4/update-exim4.conf.conf
[...]
dc_eximconfig_configtype='satellite'
dc_other_hostnames=''
dc_local_interfaces='127.0.0.1'
dc_readhost='mydomain.com'
dc_relay_domains='*.*'
dc_minimaldns='false'
dc_relay_nets=''
dc_smarthost='smtpauth.provider.fr::465'
CFILEMODE='644'
dc_use_split_config='false'
dc_hide_mailname='true'
dc_mailname_in_oh='true'
dc_localdelivery='mail_spool'

# cat /etc/exim4/passwd.client
[...]
smtpauth.provider.fr:user...@provider.fr:password

# exim4 -v -qff
LOG: queue_run MAIN
  Start queue run: pid=6510 -qff
delivering 1oDoHK-0000ta-0W (queue run pid 6510)
R: smarthost for m...@mydomain.com
T: remote_smtp_smarthost for m...@mydomain.com
Transport port=25 replaced by host-specific port=465
Connecting to provider.fr [109.234.xxx.xxx]:465 ...  TFO mode sendto, no
data: EINPROGRESS
 connected
  SMTP(closed)<<
  SMTP(close)>>
cmdlog: '(unset)'
LOG: MAIN

  H=provider.fr [109.234.xxx.xxx]: Remote host closed connection in
response to initial connection

LOG: MAIN

  == m...@mydomain.com R=smarthost T=remote_smtp_smarthost defer (-18)
H=provider.fr [109.234.xxx.xxx]: Remote host closed connection in
response to initial connection

delivering 1oDorR-0001DY-1p (queue run pid 6510)
R: smarthost for m...@free.fr
T: remote_smtp_smarthost for m...@free.fr
Transport port=25 replaced by host-specific port=465
Connecting to provider.fr [109.234.xxx.xxx]:465 ...  TFO mode sendto, no
data: EINPROGRESS
 connected    *<---- Hangs there for several minutes*
  SMTP(closed)<<
  SMTP(close)>>
cmdlog: '(unset)'
LOG: MAIN

  H=provider.fr [109.234.xxx.xxx]: Remote host closed connection in
response to initial connection

LOG: MAIN
  == m...@free.fr R=smarthost T=remote_smtp_smarthost defer (-18)

H=provider.fr [109.234.xxx.xxx]: Remote host closed connection in
response to initial connection

LOG: queue_run MAIN
  End queue run: pid=6510 -qff

Regards
Rudu