Redmine

This "in theory" is a problem with the mail server, but it seems a lot of them behave that way.

Long story short: Mails get sent once with everyone as a BCC, I'd expect mail servers to not reject the whole mail but only to not forward it to the faulty recipient. Anyway, we'll have a look, but that might mean a bigger performance hit for users not using async sending.

What a fast response!

Just to mention, I've tried to uncheck "use bcc" option in admin settings, doesn't help. Yes, I also expected that server sends emails to good recipients anyway.

I'm not sure if this is an important issue (thus I set low priority), just it's not always clear what's going on (people don't always have access to email server logs). So maybe mentioning this in docs/faq will be enough, I don't know. For us it's already fixed.

Sergey Prokhorenko wrote:

Just to mention, I've tried to uncheck "use bcc" option in admin settings, doesn't help. Yes, I also expected that server sends emails to good recipients anyway.

Well, if you uncheck the BCC box, mails get sent as CCs, so not much of an improvement in your case.

I'm not sure if this is an important issue (thus I set low priority), just it's not always clear what's going on (people don't always have access to email server logs). So maybe mentioning this in docs/faq will be enough, I don't know. For us it's already fixed.

Feel free to extend the FAQ :-)

Some MTA's behave that way; whenever delivery of one recipient fails, the rest is not processed at all. Perhaps the admin could have the option to have the Mailer dispatch e-mails with single recipients? This will be a big performance hit if the list is large.

or switch MTA :)