sophos smtp protection

Hi Ilya,

Please explain what you have already configured. Did you already configure anything and if so, please post screenshots so it's easier for others to kick in at the point where you're stuck.

my scenario:

linux mail server with virtulal users/domains

before i enabled smtp proxy in sophos i used nat rules from wan to lan all email ports i need,the problem smapassain and clamav on mail server..

so i enabled smtp protection:

simple mode

routing settings:

domains: my.com

host list: lan ip of my mail server

verify recipients: with call out

relaying settings:

checked authenticated users

create a local user in sophos for relaying

allow hosts: mail server lan ip 

advanced settings:

not use transparent

create ca in stratcom ssl and configured it for tls

on my mail server i configure relay to sophos smtp (for authincation i use local sophos user that i created)

testing:)

when i send mail from gmail to xxx@my.com>working good,sophos check the recipient in internal mail,scanning the mail and deliver it to internal mail to the recipient

when i sending mail from my webmail(my webmail on the mail server,same server!!!),work good ,it use sophos relay,all scans working

BUT i can not use anymore mail clients like outlook on port 25 or 587 ,when i configure smtp in otlook,it dont authenticate mail server,it try authenticate sohhos smtp...

in sophos i can use Ad,LDAP as authintication services...in my case i have virtual users in mysql(as data base for my mail server)

when enabling sophos mail protection its automaticly listhen to  smtp ports 25 587...so all incoming smtp ports go right to the smtp proxy..

so i configure secured connection with 465 (dnat to my mail server) for authinticated connection from mail clients such outlook o mail progs in cellphones

my scenario:

linux mail server with virtulal users/domains

before i enabled smtp proxy in sophos i used nat rules from wan to lan all email ports i need,the problem smapassain and clamav on mail server..

so i enabled smtp protection:

simple mode

routing settings:

domains: my.com

host list: lan ip of my mail server

verify recipients: with call out

relaying settings:

checked authenticated users

create a local user in sophos for relaying

allow hosts: mail server lan ip 

advanced settings:

not use transparent

create ca in stratcom ssl and configured it for tls

on my mail server i configure relay to sophos smtp (for authincation i use local sophos user that i created)

testing:)

when i send mail from gmail to xxx@my.com>working good,sophos check the recipient in internal mail,scanning the mail and deliver it to internal mail to the recipient

when i sending mail from my webmail(my webmail on the mail server,same server!!!),work good ,it use sophos relay,all scans working

BUT i can not use anymore mail clients like outlook on port 25 or 587 ,when i configure smtp in otlook,it dont authenticate mail server,it try authenticate sohhos smtp...

in sophos i can use Ad,LDAP as authintication services...in my case i have virtual users in mysql(as data base for my mail server)

when enabling sophos mail protection its automaticly listhen to  smtp ports 25 587...so all incoming smtp ports go right to the smtp proxy..

so i configure secured connection with 465 (dnat to my mail server) for authinticated connection from mail clients such outlook o mail progs in cellphones

So when I understand correctly the main problem at this moment is your clients cannot use port 25 or 587 because they get "caught" by SMTP proxy from UTM?

If this is the problem, than this will most likely happen when connecting from outside your UTM, and this will indeed be blocked (relaying is blocked). You did however configure a local user on UTM that should be able to relay, so you should normally be able to configure your outgoing mail to authenticate using these credentials.

Perhaps you can look in SMTP log where you should be able to find more information on SMTP connections (both allowed and blocked). If this doesn't help you, then please add such a connection attempt from the log to this thread (you can of course mask server/ip addresses if you like).

yes ,it is the my main problem

if i configure the localuser and pass from sophos in outlook(outgoing mail server user and pass)-its work,but...

the problem- that i cant create for each user that have email adress in my mail server another username and pass(in sophos utm)  for outlook configuration:)

if i had microsoft exchange-its very simple...i can turn on authentication service with AD in sophos.....

maybe in the fiture develop team of sophos wil make the option -authentication service to mysql databases:)

**what about no free sophos firewall?they have a solution?

Although you don't have Exchange, the same setup as in Basic Exchange setup with SMTP Proxy applies, and it appears that you have done that.  It sounds like you're trying to have your external client use the same IP as the FQDN listed in your MX record.  To have external clients reach your mail server, you will need a DNAT that uses either an Additional Address or an alternate port if you have only a single public IP.

Cheers - Bob