Allow TLSv1 for compatibility with older devices

mail-server/dovecot.nix

@@ -307,7 +307,7 @@ in
 
         mail_access_groups = ${vmailGroupName}
         ssl = required
-        ssl_min_protocol = TLSv1.2
+        ssl_min_protocol = TLSv1
         ssl_prefer_server_ciphers = no
 
         service lmtp {

mail-server/postfix.nix

@@ -271,10 +271,10 @@ in
         smtpd_tls_security_level = "may";
 
         # Disable obselete protocols
-        smtpd_tls_protocols = "TLSv1.3, TLSv1.2, !TLSv1.1, !TLSv1, !SSLv2, !SSLv3";
-        smtp_tls_protocols = "TLSv1.3, TLSv1.2, !TLSv1.1, !TLSv1, !SSLv2, !SSLv3";
-        smtpd_tls_mandatory_protocols = "TLSv1.3, TLSv1.2, !TLSv1.1, !TLSv1, !SSLv2, !SSLv3";
-        smtp_tls_mandatory_protocols = "TLSv1.3, TLSv1.2, !TLSv1.1, !TLSv1, !SSLv2, !SSLv3";
+        smtpd_tls_protocols = "TLSv1.3, TLSv1.2, TLSv1.1, TLSv1, !SSLv2, !SSLv3";
+        smtp_tls_protocols = "TLSv1.3, TLSv1.2, TLSv1.1, TLSv1, !SSLv2, !SSLv3";
+        smtpd_tls_mandatory_protocols = "TLSv1.3, TLSv1.2, TLSv1.1, TLSv1, !SSLv2, !SSLv3";
+        smtp_tls_mandatory_protocols = "TLSv1.3, TLSv1.2, TLSv1.1, TLSv1, !SSLv2, !SSLv3";
 
         smtp_tls_ciphers = "high";
         smtpd_tls_ciphers = "high";