Contexte: wordpress mailing list, private hosted postfix server, ~1K recipients.
Question: Should I
- send one mail for each recipient or
- a single mail with all recipients in BCC ?
What is good practice ? Does this have any effect on reputation/spam score ?
I am currently using a wordpress plugin that send everything in a single mail with the hundreds of recipients in BCC.
I would like to change that in order to be able to add nice stuff
List-Unsubscribe header and link, that sort of things I can only do with one email per recipient.
But if I do that, wouldn't I run into some problems sending so many mails at once ? Must I consider use of some queuing software in addition to postfix built-in mechanism ?
Note: I already read the tuning postfix documentation of postfix, so I am aware of the kind of things I can do (like having a local DNS, etc..). But I don't know what I should expect / should do.