Hi, I'm giving up. No matter what name I use (Devel-2, Devel, Justaname, Nothing), from one day to another I can't send git mails anymore: ***SNIP*** root(a)Devel64-2: /git/ipfire-2.x # git send-email --annotate -1 /tmp/Zp2mVJvp60/0001-squid-Update-to-6.11.patch Password for 'smtp://mfischer(a)submissions.ipfire.org:465': 5.5.2 <Devel..>: Helo command rejected: Invalid name. Refer to https://wiki.ipfire.org/postmaster for further information. root(a)Devel64-2: /git/ipfire-2.x # hostname Justaname root(a)Devel64-2: /git/ipfire-2.x # git send-email --annotate -1 /tmp/XKUXVyPmdy/0001-squid-Update-to-6.11.patch Password for 'smtp://mfischer(a)submissions.ipfire.org:465': 5.5.2 <Justaname..>: Helo command rejected: Invalid name. Refer to https://wiki.ipfire.org/postmaster for further information. root(a)Devel64-2: /git/ipfire-2.x # hostname Justaname root(a)Devel64-2: /git/ipfire-2.x # hostname Nothing root(a)Devel64-2: /git/ipfire-2.x # git send-email --annotate -1 /tmp/yRTXjA1gp9/0001-squid-Update-to-6.11.patch Password for 'smtp://mfischer(a)submissions.ipfire.org:465': 5.5.2 <Nothing..>: Helo command rejected: Invalid name. Refer to https://wiki.ipfire.org/postmaster for further information. ***SNAP*** If the "postmaster" would have an idea, I'd be thankful... Best Matthias