Multisite behaviour

[lightweight]

Many thanks for taking up and continuing the development of this very useful plugin, Yehudah! I have adopted the plugin for a few sites (all running in multisite mode) I run due to the bug in the default WP wp_mail function which (for some reason) duplicates the MIMEMAIL header in all outgoing emails which results in all messages sent to be rejected by Amazon's Simple Email Service (SES) which we use. The only problem I've discovered with Post-SMTP is that it doesn't seem to work nicely with multisite configurations... Ideally, it'd be great if the plugin could a) sense that it's been installed on a multisite implementation and b) allow for a "default" network configuration which would apply to all sites that don't have specific individual configurations. At present, it seems to fall back to wp_mail (i.e. failing outgoing email) for any subsites which don't have a configuration... not helpful behaviour for my use case.

[ArctoranDev]

Can help with MU integration if needed, I've been working on a custom fork anyway for something similar and also to allow the ability to use custom SMTP servers properly under TLS 1.12