Hello everyone, Hope you are keeping well. I have an issue with email forwarding that I am trying to figure out. Exim-4.97 here, with Exim4U if that matters. I have a setting where emails sent to ALIAS@domain are forwarded to USER1ACCOUNT@gmail.com and USER2ACCOUNT@gmail.com For domains with strict SPF, this definitely fails as shown below. <CUT> This message was created automatically by mail delivery software. A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed: USER1ACCOUNT@gmail.com (ultimately generated from COMMON_ADDR@domain) host gmail-smtp-in.l.google.com [142.250.27.26] SMTP error from remote mail server after end of data: 550-5.7.26 The MAIL FROM domain [alexanna.co.ke] has an SPF record with a hard 550-5.7.26 fail policy (-all) but it fails to pass SPF checks with the ip: 550-5.7.26 [41.212.32.14]. To best protect our users from spam and phishing, 550-5.7.26 the message has been blocked. Please visit 550-5.7.26 https://support.google.com/mail/answer/81126#authentication for more 550 5.7.26 information. mm11-20020a170906cc4b00b009c74e4ffa08si671339ejb.279 - gsmtp USER2@gmail.com (ultimately generated from COMMON_ADDR@domain) host gmail-smtp-in.l.google.com [142.250.27.26] SMTP error from remote mail server after end of data: 550-5.7.26 The MAIL FROM domain [alexanna.co.ke] has an SPF record with a hard 550-5.7.26 fail policy (-all) but it fails to pass SPF checks with the ip: 550-5.7.26 [41.212.32.14]. To best protect our users from spam and phishing, 550-5.7.26 the message has been blocked. Please visit 550-5.7.26 https://support.google.com/mail/answer/81126#authentication for more 550 5.7.26 information. mm11-20020a170906cc4b00b009c74e4ffa08si671339ejb.279 - gsmtp </CUT> It looks like during the forwarding, I should rewrite the From: address to COMMON_ADDR@domain instead of letting the original sender address stay in the Envelope sender? This case is similar to https://lists.exim.org/lurker/thread/20231106.101434.4a28c7c1.en.html except that I do not use the redirect router. The forwarded email is handled by the remote_smtp transport Has anyone else faced this issue with Gmail and other providers? How do you mitigate this? -- Best regards, Odhiambo WASHINGTON, Nairobi,KE +254 7 3200 0004/+254 7 2274 3223 "Oh, the cruft.", egrep -v '^$|^.*#' ¯\_(ツ)_/¯ :-) [How to ask smart questions: http://www.catb.org/~esr/faqs/smart-questions.html]