[SOLVED] Unable to send email from Round cube

Hi,
I am receiving mails from external servers, But if I send to external mail its not receiving.
If I send to the internal mail, I am receiving mails.
I have given smtp port 25 open in AWS EC2 firewall settings for inbound and outbound rules. Until do this I didn't receive incoming mail also. Now I am receiving mail but mails are not sent.
All sent mails are showed in my sent item.

 

Thanks for your reply
PFB the details.

Service is running.
amavis.service - LSB: Starts amavisd-new mailfilter
Loaded: loaded (/etc/init.d/amavis; generated)
Active: active (running) since Mon 2020-04-27 21:32:51 UTC; 2 days ago
Docs: man:systemd-sysv-generator(8)
Process: 21510 ExecStart=/etc/init.d/amavis start (code=exited, status=0/SUCCESS)
Tasks: 3 (limit: 4647)
Memory: 200.8M
CGroup: /system.slice/amavis.service
├─21525 /usr/sbin/amavisd-new (master)
├─21526 /usr/sbin/amavisd-new (ch18-avail)
└─21527 /usr/sbin/amavisd-new (ch17-avail)

##### SERVER #####
IP-address (as per hostname): ***.***.***.***
[WARN] could not determine server's ip address by ifconfig
[INFO] OS version is Debian GNU/Linux 10 (buster)

[INFO] ISPConfig is installed.
[WARN] /usr/local/ispconfig/server/lib/config.inc.php is missing.

##### VERSION CHECK #####

[INFO] php (cli) version is 7.3.14-1~deb10u1

##### PORT CHECK #####


##### MAIL SERVER CHECK #####


##### RUNNING SERVER PROCESSES #####

[WARN] I could not determine which web server is running.
[WARN] I could not determine which mail server is running.
[WARN] I could not determine which pop3 server is running.
[WARN] I could not determine which imap server is running.
[WARN] I could not determine which ftp server is running.

##### LISTENING PORTS #####
(only ()
Local (Address)
[anywhere]:110 (-)
[anywhere]:143 (-)
[anywhere]:465 (-)
[anywhere]:21 (-)
***.***.***.***:53 (-)
[localhost]:53 (-)
[anywhere]:22 (-)
[anywhere]:25 (-)
[localhost]:953 (-)
[anywhere]:993 (-)
[anywhere]:995 (-)
[localhost]:10023 (-)
[localhost]:10024 (-)
[localhost]:10025 (-)
[localhost]:10026 (-)
[localhost]:3306 (-)
[localhost]:10027 (-)
[anywhere]:587 (-)
[localhost]:11211 (-)
[localhost]10 (-)
[localhost]43 (-)
*:*:*:*::*:8080 (-)
*:*:*:*::*:80 (-)
*:*:*:*::*:465 (-)
*:*:*:*::*:8081 (-)
*:*:*:*::*:21 (-)
*:*:*:*::*:53 (-)
*:*:*:*::*:22 (-)
*:*:*:*::*:25 (-)
*:*:*:*::*:953 (-)
*:*:*:*::*:443 (-)
*:*:*:*::*:993 (-)
*:*:*:*::*:995 (-)
*:*:*:*::*:10024 (-)
*:*:*:*::*:10026 (-)
*:*:*:*::*:587 (-)

 

have you requested the removing of email sending limits, and the creation of the reverse dns?
https://aws-portal.amazon.com/gp/aws/html-forms-controller/contactus/ec2-email-limit-rdns-request

 

There is Tutorial about e-mail, it has instructions for troubleshooting issues.
https://www.howtoforge.com/how-to-install-an-email-server-with-ispconfig-on-debian-10/

 

Thank you I have raised ticket to AWS. I will update you once it is done.

 

Thank you Jesse, After 20 days hard work few applications and websites are migrated from cPanel. If there is any downtime in the server I cant face the client. I need Plan something for that.

May I wait till the AWS to reply because I found the following errors from mxtoolbox.com

dmarc clientDomain.in DNS Record not found
spf clientDomain.in DNS Record not found
mx clientDomain.in No DMARC Record found
blacklist server1.Mydomain.com Blacklisted by UCEPROTECTL34
mx clientDomain.in DMARC Quarantine/Reject policy not enabled
dns clientDomain.in SOA Serial Number Format is Invalid
smtp server1.Mydomain.com Reverse DNS does not match SMTP Banner.

 

I have raised the ticket using the link given by nhybgtvfr.
I received an email as follows:

"Thank you for submitting your request to have the email sending limit removed from your account and/or for an rDNS update.

We will require the following before this request can be processed.

* A clear/detailed use-case for sending mail from EC2.
* What type of configuration or setup have you implemented to prevent spam from originating from your Ec2 resource? (Please Elaborate)"

For the first one I mentioned what I am going to do and I confirmed them that I wont this for promotion or marketing.

Amazon Email policy https://aws.amazon.com/aup/
For second one:
Reject Email if SMTP Client
Enable HELO/EHLO Hostname Restrictions in Postfix
Enable Greylisting in Postfix
Reject Email If MAIL FROM Domain Has Neither MX Record Nor A Record
Reject Email if SMTP Client Hostname doesn’t have valid A Record
Public Realtime Blacklists

Postfix few lines:

smtpd_sender_restrictions
smtpd_recipient_restrictions
smtpd_helo_restrictions
smtpd_client_restrictions

Finally they approved it with in an hr. Now I can send mail from my server.
Thanks to everyone who help me.

 

The configurations you list as answer prevent spam from arriving at your e-mail server. They do not prevent sending of spam, which was the concern at

 

I don't know Taleman. Just I have shared what I did, But my got issue resolved.