Robert Siemer wrote: > I need to DKIM sign possibly huge emails (up to 150MB).
I know you say you need this. But even if you had it would it actually be useful to you? DKIM is needed to interchange email with random email servers around the Internet. Because said random servers will reject the mesage without it. But no random email server around the Internet will accept an SMTP message as large as 150MB. Therefore even if you had a message that was DKIM signed you would not be able to use it to transfer such a large message. You might have an associated site where you can coordinate and between your site and another specific site the file limits might be increased to allow such a large message. But in that case DKIM signing would not be needed. Since in coordinating the configuration between two sites for such a large transfer over SMTP it could be set up to allow the transfer without DKIM between those two coordinating sites. SMTP is not designed to transfer large files such as this. It's not. Much better to use a protocol designed for transfering large files. Perhaps use email for notifications of and about the transfer only. Bob
