On Fri, Nov 01, 2024 at 10:04:57PM -0700, bf...@0x.co wrote: > > If you own an iphone you can select a photo and send it to an email address. > > I have properly configured my iphone to use a mail account that is running on > an > OpenSMTPd server - it's a very simple and standard SMTP host configuration in > iphone account settings. Nothing out of the ordinary. > > When an email is sent with this configured account, on the opensmtpd server > this > error is generated: > > > smtp bad-input result="500 5.5.1 Invalid command: Pipelining not supported" > > > There are no advanced settings on the iphone....there is no place to enable or > disable pipelining or anything of that sort. > > Should I conclude that it is impossible to send email from an apple iphone to > an > opensmtpd server ? > > Thank you. >
In my experience, this kind of error is TLS related. Double check if the port and protocol settings -- namely STARTTLS vs. SSL/TLS and port 25 vs. port 465/587 -- on the iPhone match those on the server. --
