Email out is being blocked

[Drew Putvin]

I am new to this program and didn't see this mentioned anywhere. While setting up and test running my first job I got all the way to the end without any problems and all the functionality was working great; it built the doc no problem, but the email was sent back as having been blocked. I tried a few different things but I am not sure what is causing it to be blocked. When I forwarded the email manually it went through. Any Insight would be appreciated.  

Currently the format for the message is as follows.

Drew Putvin,

Thank you for using Crossway Graphics for your graphic design needs. Attached is your invoice for the project: Crossway Graphics x.

Thank you again and God bless,

Drew Putvin
Owner
Crossway Graphics
xxx-xxx-xxxx

All invoices are final and distributed following the completion of the assigned project. The full amount is due by the date listed in the invoice unless previously agreed upon in writing. Failure to pay the invoice by the date due will result in a late fee of 25% of the total and an new invoice.

The wording is temporary and may change after some proof reading 

Thanks for the help

[ete...@gmail.com]

You say you get a message to say the emails are blocked. What does that message say? Are the messages getting rejected by the receiver's email servers or are they being blocked on send by your own email server?

If you are a new user it could well be that your email server is suspicious of the new activity and is classing the bulk send as spam.

[Drew Putvin]

I get a message box in the bounce back email that says

Message blocked
Your message to XXXXXXX@gmail.com has been blocked. See technical details below for more information.

and then in plain text

The response was:

Message rejected. See https://support.google.com/mail/answer/69585 for more information.

[ete...@gmail.com]

Is the issue with all email domains or just gmail users? I reckon the google servers are thinking your message is spam.