Issue resolving recipients

First off, if this is in the wrong place I'm sorry. I'm writing the macro in Excel, but ultimately it's for Outlook. If it should be moved somewhere else, please have it moved!

I'm working on a macro to send out e-mails based off of an excel sheet. However, I'm running into an interesting problem. When using contact groups, everything works fine. If, however, I'm trying to use individual e-mail addresses in the "to" field, Outlook will not resolve them via VBA. It doesn't seem to matter if I have the e-mail address added as a contact or not. If I leave the e-mail open for a minute, it'll resolve them automatically without issue. That's not really a valid solution though, seeing as how there will often be 200+ e-mails sent out with this macro. Also, I can't just make contact groups for all of these, as that will quickly add up to over 10,000+ groups.

I know the explanation is kind of weak, but I'm not too sure what else to say just yet. I'll paste the portion of the code below in case it's helpful to anyone. If anyone has any suggestions on what else I can try, or any questions to make things clearer for you, let me know. Thank you all!!

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Hmmm ... you speak of Contact Groups and also 200 + individual emails. And you are using an Excel Sheet that has the email addresses.

If you are comfortable using a different macro, we may be able to get the solution you are seeking. The new code would be based on
you listing the email addresses in a sheet within your Workbook project. Probably as you already have it ?

Now, if you are needing to separate sub-groups from the total 200 + email addresses ... we'll need to add some more code to accomplish
that.

Let me know.

Logit notes notwithstanding, couldn't you just remove the the "add recipient" code and replace it with

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You will still need to add a for loop to go through all your customers, but this way outlook isn't being called to resolve the contact email address.
The filter code is built into the answer at: https://www.excelforum.com/excel-pro...ook-email.html

Let us know if you have questions.

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Yes ... after reviewing the code you provided in the other Forum post ... that is precisely the approach I had in mind.