In my case, a single alias was used that expands to 5000 or more addresses in a
virtual_alias_maps table (after increasing virtual_alias_expansion_limit).
The error is reproduced both when sending an email to this alias address and when just
checking with 'sendmail -bv'.
John
On 10/6/22 16:3
Hi, I encountered the same issue on two FreeBSD 13.1 + Postfix 3.7.2 installations. It
only occurs when trying to send an email with >4999 recipients (the mail queue is
otherwise empty). This issue does not happen on another machine with FreeBSD 13.0 +
Postfix 3.6.3.
After some search I found
