SMTP scripts

[Xyue]

Hi,

I tried to use SSMTP on my server to send out the email when alerts is trigger. I have installed and tried but it is not working. When i check the mail log, it shows me "timed out while receiving the initial server greeting". Any idea what is causing this error ?

TQVM.

[Xyue]

Hi Guys,

Please help.

I am trying to set the zabbix to send email to certain user when the alert is triggered. I have search in the forum and tried various way(SSMTP,sendmail,postfix) but all was failed. I have follow the instruction from the link (https://www.zabbix.com/forum/showthr...highlight=smtp) which advise to install sendmail.

When i triggered the alert from my switches, i saw the "actions" was OK. But I was not receive any alert email. I don't know which steps i am wrong.

Can anyone guide me on setting up SMTP ?

Really appreciate your help on this. Thank you very much in advance
Xyue

[Firm]

Check "Action log" page if sending alert was successful.

[Xyue]

Hi,

Nope, it failes and i was received "timeout while receiving initial server greeting". I was suspecting it was the firewall which block it. Is that possible ?

Thanks for your reply.

[Firm]

Try to simulate zabbix behavior: connect to ssmtp server manually with telnet.

[Xyue]

Hi,

Currently I'm using Postfix and below is the telnet result.
root@localhost ~]# telnet smtp.gmail.com 25
Trying 64.233.188.108...
Connected to smtp.gmail.com.
Escape character is '^]'.

It was able to connected but not able to receive 220 message.

Below is the details of my iptables:
-A INPUT -p tcp -m state --state NEW -m tcp --dport 10051 -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 3389 -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 587 -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 25 -j ACCEPT
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A INPUT -s 192.168.1.0/24 -p tcp -m tcp --dport 22 -j ACCEPT
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT

Details of main.cf
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
command_directory = /usr/sbin
config_directory = /etc/postfix
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix
debug_peer_level = 2
html_directory = no
inet_interfaces = localhost
inet_protocols = ipv4
mail_owner = postfix
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
mydestination = $myhostname, localhost.$mydomain, localhost
newaliases_path = /usr/bin/newaliases.postfix
queue_directory = /var/spool/postfix
readme_directory = /usr/share/doc/postfix-2.6.6/README_FILES
relayhost = smtp.gmail.com:587
sample_directory = /usr/share/doc/postfix-2.6.6/samples
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_sasl_security_options = noanonymous
smtp_tls_CAfile = /etc/pki/tls/certs/ca-bundle.crt
smtp_tls_mandatory_ciphers = high
smtp_tls_mandatory_protocols = TLSv1
smtp_tls_secure_cert_match = nexthop
smtp_tls_security_level = secure
unknown_local_recipient_reject_code = 550

Maillog
Feb 29 09:11:53 localhost postfix/qmgr[4062]: F2ACAF16E: from=<[email protected]>, size=466, nrcpt=1 (queue active)
Feb 29 09:16:30 localhost postfix/smtp[4064]: 36F18F184: conversation with smtp.gmail.com[64.233.188.108] timed out while receiving the initial server greeting

Any idea on this ?
Thank you very much.

[Firm]

Try (I know, [] are for pure IPs)

relayhost = [smtp.gmail.com]:587

[Xyue]

Hi,

Tried your suggestion but not working. Still having same error message. Will google for other method.

Anyway, thank you very much.