Hi! Sorry, me again :-) > > Is there a way to tell opensmtpd to relay only using IPV4 for mta? […] >
You could adapt your match line to only allow sending from your ipv4 address by adding “from src [your ipv4 address]. This is documented on the man-page. It’s not a perfect solution, but I think it might help you out. E.g.: “match from src [your ipv4 are here] for any relay” The reason is that opensmtpd tries first a bunch of IPV6 addresses > corresponding to smtp.office365.com, all failing, then finally finds an > IPV4 address that works. See below. > You might want to find out why that is happening. Thanks! > I hope this helps! Edmund P.S.: I apologise for the formatting, sending this from my phone.
