I have installed psms, and I use it with multiple accounts. The autorespond plugin works fine, with a minor exception - it scans all of my account’s inboxes for the Regex that I have created, in only one of the accounts.
Consequently, when the regex condition is met in either one of the inboxes, the autorespond plugin sends a message to that number from the account in which the Regex was set, to the number that has send me a message in my other account. This causes an inconvenience. I would be happy to know how to fix it.