Fix unset `SMTP_RETURN_PATH` environment variable causing e-mail not to send (#17982)
Fix unset `SMTP_RETURN_PATH` environment variable causing e-mail not to send (#17982)


Ryanaka/mastodon,musashino205/mastodon,theoria24/mastodon,masto-donte-com-br/mastodon,ykzts/mastodon,musashino205/mastodon,maa123/mastodon,theoria24/mastodon,koba-lab/mastodon,pinfort/mastodon,gol-cha/mastodon,ykzts/mastodon,tootcafe/mastodon,musashino205/mastodon,koba-lab/mastodon,masto-donte-com-br/mastodon,glitch-soc/mastodon,maa123/mastodon,gol-cha/mastodon,pinfort/mastodon,Ryanaka/mastodon,MitarashiDango/mastodon,cobodo/mastodon,MitarashiDango/mastodon,MitarashiDango/mastodon,maa123/mastodon,imas/mastodon,gol-cha/mastodon,glitch-soc/mastodon,Ryanaka/mastodon,MitarashiDango/mastodon,yukimochi/mastodon,h3zjp/mastodon,im-in-space/mastodon,im-in-space/mastodon,h3zjp/mastodon,gol-cha/mastodon,theoria24/mastodon,theoria24/mastodon,glitch-soc/mastodon,glitch-soc/mastodon,yukimochi/mastodon,masto-donte-com-br/mastodon,h3zjp/mastodon,imas/mastodon,masto-donte-com-br/mastodon,musashino205/mastodon,pinfort/mastodon,tootcafe/mastodon,cobodo/mastodon,koba-lab/mastodon,pinfort/mastodon,im-in-space/mastodon,imas/mastodon,ykzts/mastodon,im-in-space/mastodon,h3zjp/mastodon,maa123/mastodon,yukimochi/mastodon,tootcafe/mastodon,cobodo/mastodon,koba-lab/mastodon,ykzts/mastodon,imas/mastodon,tootcafe/mastodon,yukimochi/mastodon,cobodo/mastodon,Ryanaka/mastodon