ssmtp: Cannot open smtp.gmail.com:587

rtcary · 03-28-2016, 03:23 PM

I have researched this message on Google and tried the suggestions to no avail. Here is my setup:

ssmtp.conf:
root=bugsbunny@gmail.com
mailhub=smtp.gmail.con:587
RewriteDomain=
AuthUser=bugsbunny
AuthPass=Rabbit97
UseSTARTTLS=YES

revaliases:
root:bugsbunny@gmail.com:smtp.gmail.com:587

error message:
ssmtp: Cannot open smtp.gmail.com:587

Does anyone have ssmtp working with Centos 5? If so, do you see any problems with the above setup?

Todd

tshikose · 03-29-2016, 03:19 AM

Hi,

I do not think the problem is with CentOS 5.

Are you sure Google allows you to connect to smtp.gmail.com on TCP port 587?
Can you launch the command below?
nmap -sT -sV -p 25,587 smtp.gmail.com

bathory · 03-29-2016, 05:15 AM

Hi,

From this post, maybe you may need to add in ssmtp.conf:

Code:

TLS_CA_File=/etc/pki/tls/certs/ca-bundle.crt

Regards

rtcary · 03-29-2016, 10:12 AM

Yes, I was able to run nmap -sT -sV -p 25,587 smtp.gmail.com

I will try adding the CERT command.

Todd

rtcary · 03-29-2016, 10:33 AM

With the line added

TLS_CA_File=/etc/pki/tls/certs/ca-bundle.crt

I get the following error:

ssmtp: Authorization failed (534 5.7.9 https://support.google.com/accounts/answer/185833 ml5sm44116211pab.2 - gsmtp)

*BUT* that led me to the answer: since I have 2-step verification, I needed to use an application password. My test messages are going out. Now to see if I can remember how to switch things around e.g. make sure the current mail program is shut down and put in a symbolic link.

Thank you guys for the help...greatly appreciated!!

Todd