Administrators • Re: I can't send emails to Gmail, Outlook, Yahoo but I can receive

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

Statistics: Posted by geje2005 — Tue Jan 02, 2024 5:39 am

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