Search found 160 matches

by jamerson
24 Nov 2021 16:22
Forum: How-to
Topic: How-to Prevent external sender spoofing to EFA
Replies: 18
Views: 34618

Re: How-to Prevent external sender spoofing to EFA

The easiest best solution to prevent spoofing in a standard, simple environment is ADD BLACKLIST from @yourdomain to @yourdomain. If you handle multiple domains, add a BLACKLIST entry for each combination which should NEVER pass through your external SMTP gateway. Internally, all network equipment ...
by jamerson
18 Jun 2021 09:10
Forum: 4.x Bugs
Topic: Deliver mail to different server than for another domain fails
Replies: 2
Views: 1236

Re: Deliver mail to different server than for another domain fails

its telling you the email you are sending to doesnt exisit.
are you sure the email adres is correct?
by jamerson
18 Jun 2021 08:43
Forum: 4.x Bugs
Topic: opendmarc.service failed - kills mailscanner?
Replies: 41
Views: 4348

Re: opendmarc.service failed - kills mailscanner?

its appear to be a brut force or something similar to manipulate EFA.
what firewall are you using in front of the EFA? what ports are open from the WAN to the EFA? are you using some kind of ids/IPS?
by jamerson
15 Feb 2021 12:34
Forum: How-to
Topic: Fail2Ban config in EFA v4
Replies: 4
Views: 1610

Re: Fail2Ban config in EFA v4

pdwalker wrote:
09 Feb 2021 05:58
You might want to consider adding the postfix-sasl jail as well, if you get a lot of failed sasl authentication attempts.
this is a good idea, maybe add it out of the box.
by jamerson
24 Jan 2021 21:54
Forum: 4.x Bugs
Topic: root password
Replies: 9
Views: 3412

Re: root password

pdwalker wrote:
05 Jan 2021 07:47
I am sure there are many tutorials online for doing this.

Do you need one for winscp and putty?
Thank you my friend,
ive got it set up already.
by jamerson
24 Jan 2021 21:53
Forum: Discussion
Topic: Next Major Release OS Version Survey 2020
Replies: 18
Views: 8215

Re: Next Major Release OS Version Survey 2020

now the Centos 8 announcement, does mean anything for the efa project?
no patches will be available soon?
I think ubuntu or RH is a good OS.
by jamerson
04 Jan 2021 20:01
Forum: 4.x Bugs
Topic: root password
Replies: 9
Views: 3412

Re: root password

I strongly suggest that you use ssh keys to allow access to your root account rather than setting a password. It'll also make the winscp and putty tools easier to use. Personally, I use a non admin account as my login using ssh keys, and then taking the second step of using sudo to make any changes...
by jamerson
07 Oct 2020 00:58
Forum: Feature Requests
Topic: Shared database, to allow multiple EFA appliances sharing one truth for SQLGrey etc
Replies: 8
Views: 8710

Re: Shared database, to allow multiple EFA appliances sharing one truth for SQLGrey etc

i would love to have this set up, how can i get it configured? tried the above but broke the installation.
by jamerson
22 May 2020 09:14
Forum: Discussion
Topic: possible efa spoof
Replies: 13
Views: 5177

Re: possible efa spoof

smyers119 wrote:
20 May 2020 14:18
Authentication-Results: mx-01.domain.com; spf=fail smtp.mailfrom=julien@domain.com
good catch, i didnt see that one, but using mail-tester it scores 10/10 and spf is succecefully passed.
is this only google thing that dkim and spf failed
by jamerson
20 May 2020 09:30
Forum: Discussion
Topic: possible efa spoof
Replies: 13
Views: 5177

Re: possible efa spoof

smyers119 wrote:
18 May 2020 12:08
So gmail is showing that spf and dmarc are failing. Can you pm your domain so I can find out what your doing wrong. I'll also pm you my email so you can send me a test email.
only Dmarc is failing, spf and dkim are set up correctly.
by jamerson
18 May 2020 11:23
Forum: Discussion
Topic: possible efa spoof
Replies: 13
Views: 5177

Re: possible efa spoof

Is your dmarc configured correctly? Were you able to check/test it using a dmarc testing service? At least make sure that you have that part right. what do you mean exactly here? how to check Dmarc settings? is enabled and its published at the public dns. using mxtoolbox comes up with the right rec...
by jamerson
16 May 2020 12:36
Forum: Discussion
Topic: possible efa spoof
Replies: 13
Views: 5177

Re: possible efa spoof

@pdwalker we have spf/dkim configured wel and is valid, when we do a mail-test it does score 10/10. What are your spf settings for mail that comes from invalid servers? accept? maybe spam or reject? (+all, ~all, -all) Remember, it is up to the destination mail server to determine whether they honou...
by jamerson
14 May 2020 10:18
Forum: Discussion
Topic: possible efa spoof
Replies: 13
Views: 5177

Re: possible efa spoof

Yup, check the mail header it should give you the path the mail has taken to reach the client mailbox and go from there to figure out how the mail reached the clients inbox. (maybe you missed it in eFa or maybe it was malware directly from client to client..) Got catch i checked the header and the ...
by jamerson
13 May 2020 09:31
Forum: Discussion
Topic: possible efa spoof
Replies: 13
Views: 5177

possible efa spoof

Dear all, Today one of our customer has called because they recieved a email from someone calimed to be from our company. let assume our domain is company.com they received email from someone user@company.com time and date. when we checked the email was flagged as spam on their outlook folder. so wh...
by jamerson
07 May 2020 15:08
Forum: 4.x Bugs
Topic: Postfix all mails Reject - GreyList Off !
Replies: 8
Views: 3246

Re: Postfix all mails Reject - GreyList Off !

its seems you can ping ip but not fqdn
mostely is dns,

check if you have dns server installed/configured.
PS: make sure to disable ipv6
by jamerson
07 May 2020 15:05
Forum: 4.x Bugs
Topic: SPF Not working
Replies: 4
Views: 2113

Re: SPF Not working

i am wondering why are you using office 365 spf record to send out using your EFA? please provide more details if you need support. wihtout info/details/screenshot we wont be able to help. SPF records /IP are published ips which means you dont have to mask them, everyone on the internet can find them.
by jamerson
04 May 2020 16:26
Forum: 4.x Bugs
Topic: Update eFa-4.0.2-13 resolv.conf
Replies: 9
Views: 4123

Re: Update eFa-4.0.2-13 resolv.conf

i beleive i am on the same boat, my box keeps having issues with oubound,i thought it was ipv6 but good catch Henk " dank je wel"
i'll give it a try and check it.
by jamerson
02 May 2020 13:18
Forum: 4.x Bugs
Topic: Cron job are not running
Replies: 18
Views: 5628

Re: Cron job are not running

i beleive i ve found the issue,

if you guys using IPV6 on the network settings, make sure you disable it.
somehow its perefer to use IPV6.

ive done that and the issue is gone somehow.
by jamerson
29 Apr 2020 09:07
Forum: 4.x Bugs
Topic: Cron job are not running
Replies: 18
Views: 5628

Cron job are not running

Dear all, the below keeps happening however the box is connect online and able to ping the internet, emails arrives and send out over the efa, connection is correct. any suggestions what could be the cause? /etc/cron.hourly/0yum-hourly.cron: Could not get metalink https://mirrors.fedoraproject.org/m...
by jamerson
24 Feb 2020 17:51
Forum: How-to
Topic: Greylisting Whitelist
Replies: 1
Views: 1958

Greylisting Whitelist

Dear All, Lately been having issues with Grey listing, when customers email us from Office 365 takes ages untill its arrives. So we decieded to start using Grey listing white listing. let start Step 1. let create a file called clients_fqdn_whitelist.local on the sqlgrey listing /etc/sqlgrey/clients_...
by jamerson
25 Jan 2020 22:33
Forum: How-to
Topic: How to Setup DomainKeys (DKIM) with Postfix on EFA 4
Replies: 0
Views: 3583

How to Setup DomainKeys (DKIM) with Postfix on EFA 4

DKIM (DomainKeys Identified Mail) is a method of signing electronic emails using public-private key. DKIM is used by receiving mail server for identifying email, that they are sent by authorized mail servers. It also minimizes the possibility of getting emails SPAM. This tutorial will provide you a ...
by jamerson
10 Jan 2020 23:25
Forum: 4.x Bugs
Topic: sudo: /usr/sbin/eFa-Configure: command not found
Replies: 16
Views: 4808

Re: sudo: /usr/sbin/eFa-Configure: command not found

make sure your EFA is update.
we've found the issue and fixed it on the last cron job.
by jamerson
01 Dec 2019 21:58
Forum: Introduction
Topic: Intro from East Coast US
Replies: 2
Views: 2753

Re: Intro from East Coast US

Welcome to the community
by jamerson
13 Nov 2019 21:36
Forum: Discussion
Topic: Next Major release OS version
Replies: 64
Views: 215389

Re: Next Major release OS version

We are, currently development is slow because of limited time, but also because of all the things we want to make work in a new version.. Maybe we should just start with a initial release on centos 8 and add features later on so we have more releases.. i agree with you, let make a working release a...
by jamerson
24 Sep 2019 15:30
Forum: How-to
Topic: Can't allow specific double extensions
Replies: 4
Views: 4547

Re: Can't allow specific double extensions

i am having the same issue,
can you tell me where have you allowed this ?