I can't send emails to Gmail, Outlook, Yahoo but I can receive

[jreyes256]

Greetings.
I have the problem that I cannot send mail to those domains mentioned, my version of zimbra is Release 8.8.15_GA_3869.RHEL7_64_20190917004220 RHEL7_64 FOSS edition, Patch 8.8.15_P30.

Error:

(connect to alt4.gmail-smtp-in.l.google.com[142.250.27.27]:25: Connection timed out)

[BradC]

Have you tried talking to that SMTP server using telnet from your server?
ie, are you firewalled, in a block list or have a broken config your end?

Code: Select all

brad@xxxx:~$ telnet 142.250.27.27 25
Trying 142.250.27.27...
Connected to 142.250.27.27.
Escape character is '^]'.
220 mx.google.com ESMTP s8-20020a170906220800b006df76385de9si17662482ejs.649 - gsmtp
quit
221 2.0.0 closing connection s8-20020a170906220800b006df76385de9si17662482ejs.649 - gsmtp
Connection closed by foreign host.

[geje2005]

Zimbra Tech Team,

I can't send emails to Gmail, Outlook, Yahoo but I can receive mails from other all mail domains.

Zimbra Tech Team,

I can't send my mail server to Gmail, Outlook, Yahoo but I can receive mails from other all mail domains.

Getting Connection timed out error in 25 port.

Zimbra mail server logs as below:
mail postfix/smtp[267391]: connect to alt1.gmail-smtp-in.l.google.com[173.194.202.26]:25: Connection timed out
mail postfix/smtp[267391]: connect to alt2.gmail-smtp-in.l.google.com[142.250.141.27]:25: Connection timed out
mail postfix/smtp[267391]: connect to alt3.gmail-smtp-in.l.google.com[142.250.115.27]:25: Connection timed out
mail postfix/smtp[267391]: connect to alt4.gmail-smtp-in.l.google.com[142.250.141.26]:25: Connection timed out
connect to mta7.am0.yahoodns.net[67.195.204.77]:25: Connection timed out)
connect to mta5.am0.yahoodns.net[67.195.228.111]:25: Connection timed out

Please help me to fix the the outgoing mail issue to other mail server.
EC2 server details:
Public IPv4 address: 13.126.31.104
Domain name: mail.mtsdesignhub.com
Private IPv4 addresses: 172.31.32.255
Reverse DNS record: mail.mtsdesignhub.com.
PTR Record : ec2-3-23-155-245.us-east-2.compute.amazonaws.com.

Server configuration output as below:
sudo ufw status
Status: inactive

sudo ps aux | grep smtp
postfix 858837 0.0 0.0 65608 13472 ? S 10:46 0:00 smtpd -t pass -u -o stress= -o smtpd_tls_security_level=may -o content_filter=scan:[127.0.0.1]:10030
postfix 861717 0.0 0.0 45456 11164 ? S 10:50 0:00 smtp -t unix -u

sudo telnet 13.126.31.104 25
Trying 13.126.31.104...

Thanks and Regards
Tech team

[ianw1974]

Change your PTR record to match your MX record. I would start with that. It should most likely by: mail.mtsdesignhub.com assuming that MX record exists.

[slacker1337]

https://repost.aws/knowledge-center/ec2 ... 5-throttle

[victorialangley]

If you are unable to send email to Gmail, Outlook, or Yahoo but can still receive them, the issue is usually linked to outgoing server(SMTP) settings or migration errors. A professional solution is to use ToolsBaer IMAP to IMAP Migration, which ensures a smooth email migration while preserving server settings, authentication and folder hierarchy. This excellent tool supports all Windows versions like 11, 10, 8.1, 8, XP and Vista. This tool ensures that no folder is lost during the migration by maintaining the original mailbox structure.

[rojoblandino]

Greetings.
I have the problem that I cannot send mail to those domains mentioned, my version of zimbra is Release 8.8.15_GA_3869.RHEL7_64_20190917004220 RHEL7_64 FOSS edition, Patch 8.8.15_P30.

Error:

(connect to alt4.gmail-smtp-in.l.google.com[142.250.27.27]:25: Connection timed out)

"Connection time out" it is due a firewall or a problem of ports in your outbound connection.

If you are using a share VM on a hosting, the 25 port normally will be block and you will not be able to send emails, for security hosting share politics.

"Connection timed out" is not realted to zimbra, it is related to a outgoing problem in your connection, due a firewall or a device in the middle avoiding outgoing of the port 25.

[rojoblandino]

Have you tried talking to that SMTP server using telnet from your server?
ie, are you firewalled, in a block list or have a broken config your end?

Code: Select all

brad@xxxx:~$ telnet 142.250.27.27 25
Trying 142.250.27.27...
Connected to 142.250.27.27.
Escape character is '^]'.
220 mx.google.com ESMTP s8-20020a170906220800b006df76385de9si17662482ejs.649 - gsmtp
quit
221 2.0.0 closing connection s8-20020a170906220800b006df76385de9si17662482ejs.649 - gsmtp
Connection closed by foreign host.

If He does not share thist output, there is not any way to find a solution.