How to say i can't promise a reply, but you can send mail to me. in Japanese
1)
返事返事(henji) (n,vs) reply/answer/responseはは(ha) (int) indicating a subject/yes/indeed/well/ha!/what?/huh?/sigh約束約束(yakusoku) (n,vs) arrangement/promise/appointment/pact/engagement/convention/ruleでで(de) (prt) indicates location of action/at/in/indicates time of action/indicates means of action/cause of effect/by/and then/so/indicates continuing action/ indicates certainty, emphasis, etc.きないけどno dictionary result, likely a conjigated verbno dictionary result, likely a conjigated verbメールメール(meru) (n,vs) email/mail/maleはは(ha) (int) indicating a subject/yes/indeed/well/ha!/what?/huh?/sighしし(shi) (num) 10^24/septillion/quadrillionてくれていいよno dictionary result, likely a conjigated verbno dictionary result, likely a conjigated verb。。(。) Japanese period "."
