Having a new error message at a site running OE (200521) when trying to email out invoices. Starting today they are receiving the error message:
"There was an error attempting to send the email: <emailaddress>... Relaying denied: You must check for new mail before sending mail".

We've checked for mail, and have tested by sending emails from the client's mail client without issue. We've also performed the email test from within OE and Sales CQ without issue and they do appear in the inbox as expected.

Any thoughts?

An update from today. Many of yesterday's invoices sitting in the EMail Queue have changed to COMPLETED over night. I still have an invoice from yesterday and one from today that are giving the must check for new mail first error, but there does appear to be some movement.

I have a theory that the mailbox could be close to it's maximum size, so I have requested the client look into this to see if that potentially is the issue.

Have confirmed the mailbox has plenty of space (only 8% usage of a large mailbox and client cleaned out a bunch as a preventative measure), mail is slowly flowing from OE but many are still sitting in the Queue for a day or two and receiving that error message when we attempt to force send.

ST Support team, when you've settled after your move could you toss a couple suggestions if you have them, doesn't look like many others have experienced this issue.

Hi Jesse,

I can read the support forum for questions but have no other access yet for today.

How is your email configured to be sent (MAPI / Direct / Outlook)? Maybe try choosing a different way to see if this makes a difference.

What does the Test Email do from the Email Setup?

Did you recently install anything new for Adagio? The current SSIMAIL.DLL version is 2.2.0.3 as per the Help / About / System Info.

I have not found any known reports of that error message. If emailing was working correctly one day and then failed the next, with no changes to Adagio, then the email configuration likely needs some attention.

Jesse:

Microsoft is throttling back your email thru put.

Try email direct using your email hosts SMTP.Host_Name.com or try SMTP2GO

Sorry! I didn't get the email update on this post and didn't circle back because the client was making due with slow mailout put. I have checked on their system now and the Queue has all managed to go out. Thanks support and Doug for answering. Since you both provided some input, I've responded below

Support:
Setup is Direct
The Test emails within a couple Adagio modules in Email setup worked fine.
No recent updates, SSIMAIL.DLL is also 2.2.0.3 on this end
It was only erroring on sending items from the Queue.

Doug:
No Microsoft, Local ISP mail.tbaytel.net is the host in this case.