Sending email from Cobol using Mailjet

Anybody using Mailjet to send emails? I would appreciate your insights if so.

I'm following Mailjet's recommendations to use Marshallsoft's seeAttach and seeSmtpConnect with the parameters they specify. Server is in-v3.mailjet.com and port 587.

seeAttach works but connect fails. Various different error messages. Failure to connect or socket write error (socket 2032) are the commonest.

The log reports attempting to connect to port 25 (RemotePort 25).

I tried using seeTestConnect as well. That worked, but seeSmtpConnect still didn't.

I know this is not much detail, but maybe somebody has done this before and knows how it works. I'm new to using Mailjet.

Thanks.

Michael