I have set up sendmail to integrate the mailing system but unable to get any mail on my gmail account.
This textbox defaults to using Markdown to format your answer.
You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!
Most probably your sending port, either 25, 465 or 587 is not allowed to do outgoing connections. If you are using UFW please do the following:
sudo ufw allow 25/tcp
sudo ufw allow 465/tcp
sudo ufw allow 587/tcp
sudo ufw reload
If you are using plain IPtables use:
iptables -A INPUT -p tcp --dport 25 -j ACCEPT
iptables -A INPUT -p tcp --dport 465 -j ACCEPT
iptables -A INPUT -p tcp --dport 587 -j ACCEPT
Now to allow access to incoming connections:
Allow All Incoming SMTP To allow your server to respond to SMTP connections, port 25, run these commands:
sudo iptables -A INPUT -p tcp --dport 25 -m conntrack --ctstate NEW,ESTABLISHED -j ACCEPT
sudo iptables -A OUTPUT -p tcp --sport 25 -m conntrack --ctstate ESTABLISHED -j ACCEPT
The second command, which allows the outgoing traffic of established SMTP connections, is only necessary if the OUTPUT policy is not set to ACCEPT.
Regards, KDSys
Become a contributor for community
Get paid to write technical tutorials and select a tech-focused charity to receive a matching donation.
DigitalOcean Documentation
Full documentation for every DigitalOcean product.
Resources for startups and SMBs
The Wave has everything you need to know about building a business, from raising funding to marketing your product.
The developer cloud
Scale up as you grow — whether you're running one virtual machine or ten thousand.
Get started for free
Sign up and get $200 in credit for your first 60 days with DigitalOcean.*
*This promotional offer applies to new accounts only.