addTo took a lot of time for batch mailing

[Issy]

Hello,

I've a great batch mailing (ca. 5000 mail addresses). And for the while-loop to add each mail address to the batch mailing ($message->addTo(...)) It took more than an hour. Why does it take so long to add an email address? Can I have something better?

Thanks for help.

Issy

[Issy]

Sorry, but can anyone help me? Is there a better solution or a workaround? Or is it normal for Swift Mailer V4. In version 3, it was much faster.