CentOS Server send mail Timeout

asher!23 · 11-19-2018, 12:46 AM

We have purchased a shared hosting with CentOS installed. we are trying to send mail in centos server, It gives error connection time out.
we are trying to send mail using phpmailer library and using this smptp "smtp.office365.com" with port 587 but every time it is returning the same error.
We have tried different smtp yahoo and gmail but its not working.

When we have run this command "telnet smtp.office365.com 587" it is returning connection timeout.

bathory · 11-19-2018, 01:58 AM

Hi and welcome to LQ,

Quote:

When we have run this command "telnet smtp.office365.com 587" it is returning connection timeout.

It works from here, so that means that outgoing port 587 is closed by your provider.
You should ask them for support

Regards

asher!23 · 11-19-2018, 05:50 AM

Hello Bathory,
How will we know that 587 is closed or open?

bathory · 11-19-2018, 07:06 AM

Quote:

Originally Posted by asher!23

Hello Bathory,
How will we know that 587 is closed or open?

If you can't connect to a remote server on port 587, while you know that this port is publicly open, that means the port in question is closed.
Try "telnet smtp.gmail.com 587" to verify with another server also known to accept connections on that port.
FYI I can connect to both servers on port 587 from here...

dc.901 · 11-19-2018, 07:08 AM

Quote:

Originally Posted by asher!23

Hello Bathory,
How will we know that 587 is closed or open?

That's what telnet command is telling you.

Try this; capture output of telnet command from the hosted server where it times out. Then capture output of same telnet command from your personal machine or another machine that is not on same hosted providers network, then contact the provider with both captured output.

Additionally, do you have to use the office365 to send emails?

From your CentOS machine, you can use mail command:

Code:

echo "test email from centos machine" | mail -s Subject -r replytoemail@yourdomain.com  your_valid_email@yourdomain.com

scasey · 11-19-2018, 08:51 AM

Quote:

Originally Posted by dc.901

Additionally, do you have to use the office365 to send emails?

From your CentOS machine, you can use mail command:

Code:

echo "test email from centos machine" | mail -s Subject -r replytoemail@yourdomain.com  your_valid_email@yourdomain.com

Note: That will only work if there is a properly configure mail server running on the host. Certainly that may be the case, but it's not a given.