DNS lookup failed: address "'smtp.mail.yahoo.com'" not found: [Errno -2] Name or service not known.

Hello,

Thanks to all the great resources available, I have able to write a scrapy spider.

It is running fine locally, browing website items and sending an email through yahoo's SMTP using MailSender class.

But when deploying this spider project on Zyte, it is failing when sending the Email because the address 'smtp.mail.yahoo.com' can't be resolved:

DNS lookup failed: address "'smtp.mail.yahoo.com'" not found: [Errno -2] Name or service not known.

This is quite surprising since the address of the website the script it requesting can be resolved.

Are there limitations under Zyte Cloud?

Thanks!